Search found 31 matches

by KayleeMcCord1F
Sat Mar 17, 2018 7:10 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Creating Cell Diagrams
Replies: 1
Views: 117

Re: Creating Cell Diagrams

adding onto this, does the order of X/Y have any significance in determining if species X and Y are being oxidized or reduced?
by KayleeMcCord1F
Sat Mar 17, 2018 6:38 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Test 2 #3
Replies: 2
Views: 228

Re: Test 2 #3

What K value were we supposed to get as the answer?
by KayleeMcCord1F
Sat Mar 17, 2018 4:56 pm
Forum: Calculating Work of Expansion
Topic: Free energy and work
Replies: 3
Views: 200

Free energy and work

What is the relationship between free energy and work?
by KayleeMcCord1F
Sat Mar 17, 2018 4:53 pm
Forum: Van't Hoff Equation
Topic: Van't Hoff
Replies: 9
Views: 444

Re: Van't Hoff

Do we have to know the van't Hoff equation for the final?
by KayleeMcCord1F
Sat Mar 17, 2018 3:58 pm
Forum: Phase Changes & Related Calculations
Topic: Homework Problem 8.21
Replies: 6
Views: 1775

Re: Homework Problem 8.21

I think the equation goes (Tf-Ti) so for the Copper side it should be (T-100), because both the water and Copper should have the same final temperature at equilibrium. This will yield the 24.8 degrees C.
by KayleeMcCord1F
Sat Mar 17, 2018 3:04 pm
Forum: Phase Changes & Related Calculations
Topic: Standard States
Replies: 2
Views: 219

Standard States

How do you know when a substance is in its standard state?
by KayleeMcCord1F
Mon Mar 12, 2018 12:29 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 890723

Re: Post All Chemistry Jokes Here

Hey do you have any sodium bromide?
Na BrO
by KayleeMcCord1F
Mon Mar 12, 2018 12:14 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 890723

Re: Post All Chemistry Jokes Here

I tell bad chemistry jokes because all the good ones Ar.
by KayleeMcCord1F
Mon Mar 12, 2018 12:07 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalyst Example from lecture 3/12
Replies: 3
Views: 129

Catalyst Example from lecture 3/12

In the ozone example about homogeneous catalysts in lecture today, which species is actually the catalyst?
by KayleeMcCord1F
Mon Mar 12, 2018 11:08 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Intermediates
Replies: 6
Views: 175

Re: Intermediates

To be an intermediate, the species just needs to cancel out within the set of reaction steps given. Reaction coefficients are also important when checking to see if things cancel out!
by KayleeMcCord1F
Mon Mar 12, 2018 9:51 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: 15.51
Replies: 6
Views: 196

Re: 15.51

To determine the exponents we would need some experimental data.
by KayleeMcCord1F
Mon Mar 12, 2018 9:47 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: HW 15.49
Replies: 5
Views: 426

Re: HW 15.49

What's an example of a situation when an intermediate would be considered in the overall rate law?
by KayleeMcCord1F
Sun Mar 11, 2018 3:54 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: K
Replies: 7
Views: 235

Re: K

k can be changed by altering the temperature or activation energy.
by KayleeMcCord1F
Sun Mar 11, 2018 3:51 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: slow reaction mechanisms
Replies: 4
Views: 156

Re: slow reaction mechanisms

The overall reaction rate will be determined by the slowest step.
by KayleeMcCord1F
Sun Mar 11, 2018 3:47 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: 0 order
Replies: 6
Views: 197

Re: 0 order

A zero order reaction has a linear graph with a negative slope.
by KayleeMcCord1F
Sun Mar 11, 2018 3:45 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Using pre-equilibrium approach
Replies: 3
Views: 111

Re: Using pre-equilibrium approach

Should we always start problems using the pre-equilibrium approach?
by KayleeMcCord1F
Sun Mar 11, 2018 3:42 pm
Forum: Second Order Reactions
Topic: molecularity
Replies: 6
Views: 357

Re: molecularity

You can determine molecularity by the number of molecules of reactants.
by KayleeMcCord1F
Sun Mar 11, 2018 3:37 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Energy barrier
Replies: 3
Views: 78

Re: Energy barrier

I think the higher the energy barrier, the slower the step will be because the barrier is harder to overcome.
by KayleeMcCord1F
Sun Mar 11, 2018 3:35 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: What is Molecularity?
Replies: 9
Views: 623

Re: What is Molecularity?

Is there a maximum molecularity that we'll deal with in this class?
by KayleeMcCord1F
Sun Mar 11, 2018 3:33 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Molecularity and Coefficients
Replies: 3
Views: 166

Re: Molecularity and Coefficients

Molecularity just has to do with the number of molecules coming together, rather than the type/identity of the molecules.
by KayleeMcCord1F
Sun Mar 11, 2018 3:25 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Rate-determining slowest step
Replies: 5
Views: 185

Re: Rate-determining slowest step

I believe that the rates will be given along with the mechanism, and we can determine the slowest step from that.
by KayleeMcCord1F
Sun Mar 04, 2018 12:57 pm
Forum: First Order Reactions
Topic: Pseudo-1st-Order
Replies: 6
Views: 237

Re: Pseudo-1st-Order

Will we be expected to be able to apply this concept on the test and/or final?
by KayleeMcCord1F
Sun Feb 11, 2018 4:48 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Standard Conditions and Temperature
Replies: 5
Views: 602

Re: Standard Conditions and Temperature

Also, how should we know when to leave answers in terms of J vs. kJ?
by KayleeMcCord1F
Sun Feb 11, 2018 4:47 pm
Forum: Balancing Redox Reactions
Topic: Reduction and Oxidation
Replies: 4
Views: 110

Re: Reduction and Oxidation

Is it necessary to memorize the oxidation numbers for some elements?
by KayleeMcCord1F
Sun Feb 11, 2018 4:45 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: cell diagram (hw14.11)
Replies: 3
Views: 133

Re: cell diagram (hw14.11)

How do you know which direction things move through the salt bridge?
by KayleeMcCord1F
Sun Jan 21, 2018 7:13 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat Capacity Properties
Replies: 3
Views: 108

Re: Heat Capacity Properties

Specific heat capacity (grams) and molar heat capacity (mols) both depend on the amount of substance present, making them extensive properties.
by KayleeMcCord1F
Sun Jan 21, 2018 7:07 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Enthalpy
Replies: 3
Views: 109

Re: Enthalpy

The enthalpy of a system is the total amount of heat present in it.
by KayleeMcCord1F
Sun Jan 21, 2018 7:04 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Intensive vs. Extensive
Replies: 3
Views: 194

Re: Intensive vs. Extensive

An extensive property relies on the amount of matter present while an intensive property relies on the type of matter present.
by KayleeMcCord1F
Sun Jan 14, 2018 11:48 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Standard States
Replies: 4
Views: 223

Re: Standard States

It may be helpful just to remember the two that are liquids (mercury and bromine) and that the noble gases plus F, N, O, and Cl are gases and the rest are solids.
by KayleeMcCord1F
Sun Jan 14, 2018 11:41 pm
Forum: Phase Changes & Related Calculations
Topic: Temperature and Heat
Replies: 4
Views: 170

Re: Temperature and Heat

Temperature stays constant during a phase change because the heat energy is being used to change the state of the reactant instead of raising the temperature.
by KayleeMcCord1F
Sun Jan 14, 2018 11:36 pm
Forum: Phase Changes & Related Calculations
Topic: Steam burning more than water question
Replies: 4
Views: 153

Re: Steam burning more than water question

I think steam burns more than liquid water because when steam hits the skin it undergoes a phase change (to liquid) which releases a ton of energy into the skin.

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