The rate constant of the fi rst-order reaction 2 N2O(g) S
2 N2(g) O2(g) is 0.76 s1 at 1000. K and 0.87 s1 at 1030. K.
Calculate the activation energy of the reaction.
the solutions manual uses the gas constant in terms of kJ. is this necessary? or can we use the gas constant in terms of J?
Search found 72 matches
- Fri Mar 15, 2019 8:50 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: homework problem 15.61
- Replies: 1
- Views: 273
- Fri Mar 15, 2019 8:42 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: 15.61 equation
- Replies: 3
- Views: 752
Re: 15.61 equation
is the second equation necessary to use? would the first equation produce the same answer?
- Fri Mar 15, 2019 7:49 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: intermediates
- Replies: 4
- Views: 433
intermediates
do you include intermediates in the rate law for a certain step?
- Fri Mar 15, 2019 7:30 pm
- Forum: Second Order Reactions
- Topic: 15.39a - "0.37[A]o"
- Replies: 2
- Views: 543
Re: 15.39a - "0.37[A]o"
i figured it out. That information pertains to the second part of the problem. it finds the concentration of A to put into the rate law equation and solve for t. i dont think it has anything to do with part a.
- Fri Mar 15, 2019 7:22 pm
- Forum: Second Order Reactions
- Topic: 15.39a - "0.37[A]o"
- Replies: 2
- Views: 543
Re: 15.39a - "0.37[A]o"
i am also confused by this.. the concentrations used to find that answer of part a is from the information given in part b
- Thu Mar 14, 2019 11:18 pm
- Forum: First Order Reactions
- Topic: integrated rate laws
- Replies: 3
- Views: 421
Re: integrated rate laws
thank you so much!
- Thu Mar 14, 2019 10:32 pm
- Forum: First Order Reactions
- Topic: integrated rate laws
- Replies: 3
- Views: 421
integrated rate laws
how do you know which integrated rate law to use in a problem? that is... the ln equation vs the e equation? if that makes sense.
- Thu Mar 14, 2019 3:38 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: collision theory
- Replies: 2
- Views: 311
Re: collision theory
thank you !!
- Thu Mar 14, 2019 12:24 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: collision theory
- Replies: 2
- Views: 311
collision theory
is collision theory going to be on the final?
- Thu Feb 28, 2019 5:49 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: water in cell diagram
- Replies: 1
- Views: 241
water in cell diagram
Is water (H2O) included in the cell diagram if it is within the half reaction? Or do you leave it out?
- Wed Feb 27, 2019 6:41 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: platinum [ENDORSED]
- Replies: 6
- Views: 755
platinum [ENDORSED]
how do you know which side to add platinum on in a cell diagram?
- Wed Feb 27, 2019 5:13 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: calc reaction gibbs free energy
- Replies: 1
- Views: 249
calc reaction gibbs free energy
when calculating reaction gibbs free energy, why do the moles not cancel out in the end? when you multiply by the amount of moles?
- Mon Feb 25, 2019 10:27 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: E not
- Replies: 2
- Views: 338
E not
What is E not and how is it different from E?
- Mon Feb 25, 2019 10:26 pm
- Forum: Balancing Redox Reactions
- Topic: oxidation number
- Replies: 2
- Views: 331
oxidation number
how do you find the oxidation number of an element?
- Mon Feb 25, 2019 10:25 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: salt bridge
- Replies: 1
- Views: 236
salt bridge
what is the necessity of the salt bridge/what does it do?
- Mon Feb 25, 2019 10:24 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: salt bridge
- Replies: 5
- Views: 595
salt bridge
what is the necessity of the salt bridge/what does it do?
- Mon Feb 25, 2019 10:24 pm
- Forum: Balancing Redox Reactions
- Topic: Gibbs free energy
- Replies: 1
- Views: 226
Gibbs free energy
How does Gibbs free energy pertain to electrochemistry?
- Wed Feb 20, 2019 9:15 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: entropy
- Replies: 4
- Views: 624
entropy
What is the difference between entropy and enthalpy?
- Wed Feb 20, 2019 9:14 pm
- Forum: Calculating Work of Expansion
- Topic: expansion
- Replies: 2
- Views: 331
expansion
How do you know if a system has done expansion work or not?
- Wed Feb 20, 2019 6:49 pm
- Forum: Ideal Gases
- Topic: units
- Replies: 15
- Views: 1393
units
I got marked down for putting "bar" in my K value on the midterm. Does anyone know why this is?
- Sat Feb 09, 2019 5:37 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: MJ
- Replies: 1
- Views: 804
MJ
In the textbook, it refers to a measurement of MJ? would that be milijoules? or megajoules? I have never seen that before.
- Fri Feb 08, 2019 5:15 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat capacity
- Replies: 1
- Views: 274
Heat capacity
when would be the appropriate time to use the simple heat capacity equation instead of specific/molar?
- Fri Feb 08, 2019 4:56 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: ideal gas volume
- Replies: 1
- Views: 246
ideal gas volume
In the textbook, it says that U is independent of volume bc its an ideal gas. I am confused on why this is. When dealing with ideal gasses, do you ignore the volume when trying to find internal energy?
- Mon Feb 04, 2019 1:48 pm
- Forum: Calculating Work of Expansion
- Topic: Degeneracy
- Replies: 6
- Views: 837
Degeneracy
Can someone please explain the concept and how to determine degeneracy?
- Mon Feb 04, 2019 1:47 pm
- Forum: Calculating Work of Expansion
- Topic: Residual entropy
- Replies: 1
- Views: 250
Residual entropy
Can someone please explain when to use the equation for positional residual entropy?
- Mon Feb 04, 2019 1:46 pm
- Forum: Calculating Work of Expansion
- Topic: Reversible expansion
- Replies: 1
- Views: 232
Reversible expansion
Can someone please explain when an isothermal expansion would occur?
- Mon Jan 28, 2019 1:22 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Specific heat capacity
- Replies: 3
- Views: 508
Specific heat capacity
How is the specific heat capacity determined?
- Mon Jan 28, 2019 1:21 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat capacity
- Replies: 1
- Views: 182
Heat capacity
How is the heat capacity determined?
- Mon Jan 28, 2019 1:20 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Extensive vs intensive
- Replies: 2
- Views: 264
Extensive vs intensive
What is the difference between an intensive and extensive property?
- Wed Jan 23, 2019 1:21 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: State property
- Replies: 3
- Views: 340
State property
Can someone please explain what a state property is?
- Wed Jan 23, 2019 1:20 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Exothermic and endothermic
- Replies: 3
- Views: 440
Exothermic and endothermic
What is the difference between an endothermic reaction and an exothermic reaction?
- Sun Jan 20, 2019 11:08 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Lecture notes
- Replies: 2
- Views: 939
Lecture notes
Can someone please post the lecture notes from Friday!
- Sun Jan 13, 2019 4:06 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: reaction quotient [ENDORSED]
- Replies: 4
- Views: 549
reaction quotient [ENDORSED]
Can someone please explain how and when to use the reaction quotient and the difference between the reaction quotient and concentration?
- Sun Jan 13, 2019 4:05 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: converting between partial pressure and concentration
- Replies: 2
- Views: 28318
converting between partial pressure and concentration
Can someone please explain to me how to convert between partial pressure and concentration?
- Sun Jan 13, 2019 4:03 pm
- Forum: Ideal Gases
- Topic: When is pv=nrt used? [ENDORSED]
- Replies: 5
- Views: 555
When is pv=nrt used? [ENDORSED]
Can someone please explain to me when the ideal gas law is used?
- Sat Dec 08, 2018 10:07 pm
- Forum: Administrative Questions and Class Announcements
- Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
- Replies: 118
- Views: 21440
Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
for number 34 you have to find the limiting reagent of the acid and base essentially. CaO dissociates to Ca2+ and O2-, and think of O2- + H2O -> 2OH- . So 1 mol CaO is equal to 2 mol OH-, maybe that's your error? Okay.. so you don't subtract the CaO concentration from the HCl concentration? you jus...
- Sat Dec 08, 2018 9:24 pm
- Forum: Administrative Questions and Class Announcements
- Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
- Replies: 118
- Views: 21440
Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
Can someone please explain how to do number 34? I understand that they neutralize each other, but I'm not exactly sure on what steps to use to find the answer
- Sat Dec 08, 2018 9:16 pm
- Forum: Administrative Questions and Class Announcements
- Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
- Replies: 118
- Views: 21440
Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
bonnie_schmitz_3K wrote:I think I understand the basis of how to do number 34, but I keep getting a pH of 2.10. Did anyone else make the error same/know what my error is?
I'm making that error, but I don't know what the issue is.
- Sat Dec 08, 2018 8:27 pm
- Forum: Administrative Questions and Class Announcements
- Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
- Replies: 118
- Views: 21440
Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
Can someone please explain number 28?
- Sat Dec 08, 2018 7:58 pm
- Forum: Administrative Questions and Class Announcements
- Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
- Replies: 118
- Views: 21440
Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
Can someone please explain why in number 21 the oxidation number for iron is 2+?
- Sat Dec 08, 2018 6:57 pm
- Forum: Student Social/Study Group
- Topic: Practice Final
- Replies: 2
- Views: 807
Practice Final
Does anyone know where to find a practice final? Other than the churro practice final?
- Sat Dec 08, 2018 6:53 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Ka
- Replies: 1
- Views: 227
Ka
Will we have to use the Ka formula on the final? What is an example of a problem that asks to use that formula?
CN Charge
Can someone please help me determine the charge of the CN ligand?
- Mon Dec 03, 2018 8:27 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Ka
- Replies: 1
- Views: 227
Ka
When would you use the Ka calculation?
- Mon Dec 03, 2018 8:26 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: ph vs pOH
- Replies: 5
- Views: 544
ph vs pOH
What is the difference between ph and pOH?
- Mon Dec 03, 2018 8:24 pm
- Forum: Conjugate Acids & Bases
- Topic: conjugate acids
- Replies: 3
- Views: 576
conjugate acids
Can someone help me write the formula for the conjugate acids of CH3NH2 and methylamine
- Mon Dec 03, 2018 8:22 pm
- Forum: Conjugate Acids & Bases
- Topic: Ion concentration
- Replies: 2
- Views: 320
Ion concentration
Can someone please explain how to determine the ion concentrations in strong acids/bases?
- Mon Dec 03, 2018 8:20 pm
- Forum: Bronsted Acids & Bases
- Topic: Difference
- Replies: 2
- Views: 246
Difference
Can someone please explain to me the difference between Lewis acids/bases and bronsted?
- Mon Dec 03, 2018 8:18 pm
- Forum: Amphoteric Compounds
- Topic: Definition
- Replies: 6
- Views: 614
Definition
Can someone please explain and define amphoteric?
- Sun Nov 25, 2018 5:07 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Sigma vs pi bonds
- Replies: 7
- Views: 774
Sigma vs pi bonds
Can someone please explain to me the difference between sigma and pi bonds?
- Sun Nov 25, 2018 5:05 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Dipole
- Replies: 2
- Views: 303
Dipole
Can someone please explain to me what exactly dipole means?
- Sun Nov 25, 2018 5:04 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Xenon Tetrafluoride
- Replies: 3
- Views: 392
Xenon Tetrafluoride
Will someone please explain to me how Xenon in Xenon tetrafluoride has 6 regions of electron density?
- Mon Nov 19, 2018 1:52 pm
- Forum: Sigma & Pi Bonds
- Topic: Sigma and pi bonds
- Replies: 2
- Views: 340
Sigma and pi bonds
Can someone please explain the difference between sigma bonds and pi bonds? I am very confused.
- Mon Nov 19, 2018 1:49 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge
- Replies: 8
- Views: 3534
Formal Charge
Can someone explain the other way to determine the formal charge? The formula used in class confuses me and I am aware there is another, clearer way!
- Mon Nov 19, 2018 1:48 pm
- Forum: Hybridization
- Topic: Hybridized orbitals
- Replies: 1
- Views: 107
Hybridized orbitals
Can someone please explain how the one s orbital and one p orbital creates the 2sp hybridized orbitals?
- Mon Nov 19, 2018 1:47 pm
- Forum: Hybridization
- Topic: electron density in regards to # of hybrid orbitals
- Replies: 4
- Views: 465
electron density in regards to # of hybrid orbitals
Can someone please explain to me how the # of hybrid orbitals indicates the regions of electron density?
- Mon Nov 19, 2018 1:44 pm
- Forum: Hybridization
- Topic: 4.33 Homework Problem
- Replies: 2
- Views: 230
4.33 Homework Problem
Can someone please explain this homework problem?
"State the hybridization of the atom in boldface type in each of the following molecules:
a) BeCl2 (Be)
b) BH3 (B)
c) BH4- (B)
d) SiF4 (Si)
Thank you !!
"State the hybridization of the atom in boldface type in each of the following molecules:
a) BeCl2 (Be)
b) BH3 (B)
c) BH4- (B)
d) SiF4 (Si)
Thank you !!
- Mon Nov 19, 2018 1:41 pm
- Forum: Lewis Structures
- Topic: Lewis Structure for Ammonium chloride
- Replies: 3
- Views: 2533
Re: Lewis Structure for Ammonium chloride
thank you so much!! it makes sense now.
- Mon Nov 19, 2018 1:41 pm
- Forum: Ionic & Covalent Bonds
- Topic: Bond Lengths
- Replies: 10
- Views: 1091
Bond Lengths
Can someone explain how to determine the bond lengths given that the single bond length is 140pm and the double bond is 120pm in a nitrate structure?
- Mon Nov 19, 2018 1:38 pm
- Forum: Lewis Structures
- Topic: Lewis Structure of BrO3-
- Replies: 3
- Views: 9970
Lewis Structure of BrO3-
Can someone please help me with the lewis structure of BrO3-? I don't understand where the double bonds come in.
- Mon Nov 19, 2018 1:36 pm
- Forum: Trends in The Periodic Table
- Topic: Ionization energy
- Replies: 4
- Views: 830
Ionization energy
Can someone please explain why Na has a lower first ionization energy compared to Mg?
- Mon Nov 19, 2018 1:35 pm
- Forum: Photoelectric Effect
- Topic: Speed vs frequency
- Replies: 2
- Views: 684
Speed vs frequency
Can someone please explain, comment, and show that the speed, V, of the ejected electron and the frequency, v, of the incoming radiation are related by E=hv=l + 1/2mV^2.
- Mon Nov 19, 2018 1:33 pm
- Forum: Photoelectric Effect
- Topic: Difference between ionization energy and threshold energy
- Replies: 1
- Views: 989
Difference between ionization energy and threshold energy
What is the difference between ionization energy and threshold energy, if there is one?
- Mon Nov 19, 2018 1:30 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Degeneracy
- Replies: 4
- Views: 5233
Degeneracy
Can someone please explain exactly what degeneracy means? I am having a hard time understanding it.
- Mon Nov 19, 2018 1:29 pm
- Forum: Balancing Chemical Reactions
- Topic: Why do we balance chemical equations?
- Replies: 13
- Views: 8487
Why do we balance chemical equations?
For the question that asks why do we balance chemical equations, what was the exact answer that was desired? Thank you!
- Mon Nov 19, 2018 1:27 pm
- Forum: Empirical & Molecular Formulas
- Topic: Determining Empirical formula
- Replies: 4
- Views: 706
Determining Empirical formula
Can someone help me start the problem of finding the empirical formula when given molecules instead of atoms. For example, the question asks to find the empirical formula given 1.811 g of CO2 and 0.3172 g of H2O. Thank you!
- Mon Nov 19, 2018 1:25 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lewis Structure of OSbCL3 and shape
- Replies: 2
- Views: 391
Lewis Structure of OSbCL3 and shape
How do I determine the lewis structure and shape of the molecule OSbCL3?
- Mon Nov 19, 2018 1:23 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond angles of H3O+
- Replies: 2
- Views: 507
Bond angles of H3O+
Can someone please help me determine the bond angles at the central atom of the hydronium ion, H3O+? Thank you.
- Mon Nov 19, 2018 1:18 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Homework This Week
- Replies: 1
- Views: 261
Homework This Week
Does anyone know if there is homework due this week in sections?
- Sun Nov 11, 2018 11:45 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polar vs Nonpolar
- Replies: 5
- Views: 671
Polar vs Nonpolar
How do you determine if the molecule is polar or non polar? Do you determine it from the Lewis structure or are there other steps involved?
- Sun Nov 11, 2018 11:42 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 4.12 Homework Problem
- Replies: 1
- Views: 1255
4.12 Homework Problem
Can someone please explain to me how they got the Lewis Structure for PF4-, and the VSEPR formula for that species, and how to predict the shape based off of that?
- Sun Nov 04, 2018 9:58 pm
- Forum: Lewis Structures
- Topic: Lewis Structure for Ammonium chloride
- Replies: 3
- Views: 2533
Lewis Structure for Ammonium chloride
Can someone please explain to me why the Cl- is not connected to the ammonium molecule?