Search found 18 matches

Sun Mar 04, 2018 11:24 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: slow step
Replies: 3
Views: 190

slow step

how would the rate be determined if the slow step is the second step
Sun Mar 04, 2018 11:22 am
Forum: General Rate Laws
Topic: change in concentration vs rate
Replies: 1
Views: 111

change in concentration vs rate

In many of the examples in class and textbooks when giving an experimental data table with the changes in concentrations in each experiment w evaluate the change in concentration and see the rate increase how would we solve if the change in concentration causes the rate to decrease
Sun Mar 04, 2018 11:17 am
Forum: Method of Initial Rates (To Determine n and k)
Topic: determining order
Replies: 3
Views: 177

determining order

when determining the order of a reactant can the value ever be 1/2 or would we round to the nearest whole number if we do not calculate a whole number?
Sun Feb 11, 2018 3:30 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: equilibrium
Replies: 3
Views: 225

equilibrium

does anyone know the value of e, cell potential when the reaction is at equilibrium and favorable is the sign negative like delta g or positive?
Sun Feb 11, 2018 3:28 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: 11.5
Replies: 1
Views: 133

11.5

11.55 The equilibrium constant Kc for the reaction 2 CO(g) ! O2(g) ∆ 2 CO2(g) is 0.66 at 2000 #C. If 0.28 g of CO and 0.032 g of O2(g) are placed in a 2.0-L reaction vessel and heated to 2000 #C, what will the equilibrium composition of the system be? (You may wish to use graphing software or a calc...
Sun Feb 11, 2018 3:25 pm
Forum: Balancing Redox Reactions
Topic: E cell potiential
Replies: 2
Views: 130

E cell potiential

can someone clarify in the formula to calculate the cell potential the value we use for moles in the equation is the value for the electrons when balancing the reaction
Sun Jan 28, 2018 3:40 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: 9.11
Replies: 2
Views: 417

9.11

Calculate the change in entropy when the pressure of 1.50 mol Ne(g) is decreased isothermally from 15.0 atm to 0.500 atm. Assume ideal behavior.
How would you calculate deltaS for an ideal gas
Sun Jan 28, 2018 3:36 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: which w formula to use
Replies: 2
Views: 130

which w formula to use

for questions where we have to calculate pressure we only use the formula w=-pdeltav only when the pressure is constant?
Tue Jan 23, 2018 5:25 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: test 3
Replies: 2
Views: 163

Re: test 3

oh yes I mean test one for chem 14B although molecular shape is not in 14B the molecular kits can be useful for solving bond enthalpy problems if you are a visual learner
Tue Jan 23, 2018 4:12 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: test 3
Replies: 2
Views: 163

test 3

for test 3 are we allowed to use or molecular models on the test
Mon Jan 15, 2018 11:56 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Born Habers Cycle [ENDORSED]
Replies: 4
Views: 303

Re: Born Habers Cycle[ENDORSED]

thank you I noticed I just figured more practice the better so I should not worry about this cycle on tests or anything?
Sun Jan 14, 2018 6:23 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: problem 8.47
Replies: 1
Views: 122

problem 8.47

8.47 For a certain reaction at constant pressure, !H # \$15 kJ, and 22 kJ of expansion work is done on the system. What is delta U for this process?
Sun Jan 14, 2018 6:20 pm
Forum: Phase Changes & Related Calculations
Topic: problem 8.29
Replies: 2
Views: 172

problem 8.29

8.29 Which molecular substance do you expect to have the higher molar heat capacity, NO or NO2? Why?
Sun Jan 14, 2018 6:18 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Born Habers Cycle [ENDORSED]
Replies: 4
Views: 303

Born Habers Cycle[ENDORSED]

in example 8.12 in the textbook it uses born Haber cycle to calculate the lattice enthalpy can someone explain this cycle in terms
Mon Nov 27, 2017 8:38 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: structure of chelate
Replies: 2
Views: 247

Re: structure of chelate

thanks so much!
Sun Nov 26, 2017 10:49 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: structure of chelate
Replies: 2
Views: 247

structure of chelate

for any chelate can we automatically assume the shape is a ring?
Sun Nov 26, 2017 10:45 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: delta G
Replies: 2
Views: 174

delta G

in chapter 11 delta G is mention what is delta G? what change is it referring to?
Sun Nov 26, 2017 10:43 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: convertine to partial pressure
Replies: 2
Views: 267

convertine to partial pressure

can anyone clarify with an example of how to convert to partial pressure if we have a gas?