1. The rate constant of a reaction increases when: check all that apply. Select
ID: 807399 • Letter: 1
Question
1. The rate constant of a reaction increases when:
check all that apply.
Select one or more:
a. the concentration decreases
b. the activation energy decreases
c. the Temperature increases
d. the concentration increases
2. The rate constant k of a chemical reaction increases as:
Select one:
a. The concentration of products goes down
b. The volume of the solution decreases
c. stays the same
d. The concentration of the reactants goes up
3. The reaction: 2 N2O5 --> 4 NO2 + O2 is a first order reaction.
Which is the correct rate law?
Select one:
a. Rate = 2 N2O5
b. Rate = k[N2O5]2[NO2]4[O2]
c. k = [N2O5]2[NO2]4[O2]
d. Rate = k[N2O5]
e. Rate = k[N2O5]2
4. The reaction: H2 + 2 ICl --> 2 HCl + I2 and has a rate law of Rate = k[H2][ICl]
This reaction is:
Select one:
a. 2nd order in [H2] and 2nd order in [ICl]
b. 1st order in [H2] and 2nd order in [ICl]
c. 2nd order in [H2] and 1st order in [ICl]
d. 1st order in [H2] and 1st order in [ICl]
e. 3rd order overall
Explanation / Answer
1. The rate constant of a reaction increases when:
b. the activation energy decreases
c. the Temperature increases
2. The rate constant k of a chemical reaction increases as:
c. stays the same
3. The reaction: 2 N2O5 --> 4 NO2 + O2 is a first order reaction.
d. Rate = k[N2O5]
4. The reaction: H2 + 2 ICl --> 2 HCl + I2 and has a rate law of Rate = k[H2][ICl]
d. 1st order in [H2] and 1st order in [ICl]
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