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Worksheetsreaction kinetics
Total questions: 20
Worksheet time: 21mins
Given the following balanced equation :
2NO(g) + Cl2(g) → 2NOCl(g)
If the rate of disappearance of Cl2 is 4.84 x 10-2 Ms-1, what is the rate of disappearance of NO?
1.45 x 10-2 Ms-1
2.42 x 10-2 Ms-1
3.67 x 10-2 Ms-1
9.68 x 10-2 Ms-1
The reaction A + 2B → products was found to have the rate law, k = k[A][B]2. Predict by what factor the rate of reaction will increase when the concentration of B is doubled and the concentration of A remained uncanged
2
4
6
8
The catalyst alters the rate of a chemical reaction by,
providing an alternative pathway with a lower Ea
changing the products formed in the direction of the reaction
providing a surface on which the molecules react
increasing the frequencies of collisions between molecules
Decreasing concentration has which of the following effects on reaction rate?
Increases reaction rate.
Has no effect on reaction rate.
Decreases reaction rate.
A temperature increase causes the particles
to slow down
move faster
collide higher
in the right order
What is the unit for rate constant,K if rate law:
Rate = K [A]
s-1
M s-1
M-1 s-1
M-2 s-1
Given the chemical equation, Haber Prosess
N2(g) + 3H2 (g) --> 2NH3 (g)
Based on this reaction, first order for concentration N2 and zero order for concentration H2.
Write rate law:
Rate = K [N2]1 [H2]1
Rate = K [N2]1
Rate = K [H2]0
Rate = K [N2]1 [H2]3
What is k?
reaction rate
equilibrium constant
rate constant
another reactant
How are the exponents n and m determined?
Copper catalyses the reaction between zinc and dilute sulfuric acid.
Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g)
Why does copper affect the reaction?
Decreases the activation energy
Increases the activation energy
Increases the enthalpy change
Decreases the enthalpy change
The rate expression for the reaction
X(g) + 2Y(g) → 3Z(g) is
rate = k[X]0 [Y]2
By which factor will the rate of reaction increase when the concentrations of X and Y are both increased by a factor of 3?
6
9
18
27
