Question: Which of the following is not a first order reaction?
A Decomposition of H
2O
2
B Decomposition of N
2O
C Decomposition of N
2O
5
D Decomposition of SO
2Cl
2
Answer: Decomposition of N2O
| Aspect |
Description |
| Reaction Order |
First order |
| Rate Law Expression |
A → Products
Rate = k[A] where [A] is the concentration of reactant A |
| Rate Constant (k) |
Positive constant that depends on the specific reaction |
| Dependence on Concentration |
The rate of the reaction is directly proportional to the concentration of the reactant (A) |
| Half-life |
t1/2 = (0.693 / k) |
| Units of Rate Constant (k) |
Depends on the overall reaction order |
| Examples
|
· Decomposition of SO2Cl2
SO2Cl2 → Cl2 + SO2
Rate = k[SO2Cl2]
· Decomposition of N2O5
2N2O5 → O2 + 4NO2
Rate = k[N2O5]
· Decomposition of H2O2
2H2O2 → 2H2O + O2
Rate = k[H2O2] |
