Advertisements
Advertisements
Questions
What is the rate constant?
What do you understand by rate constant?
What is meant by the rate constant of a reaction?
Advertisements
Solution 1
When the concentration (active mass) of each reactant is at unity, the rate constant of a chemical reaction equals the rate of the reaction.
∵ Rate of reaction ∝ [Reactant]
If A → product, then
rate (R) = k[A]
If [A] = 1, then rate, R = k,
where k is the rate constant.
Solution 2
- The rate constant of a reaction is equal to the rate of reaction when the concentration of each of the reactants is unity.
- At a specific temperature, a reaction's rate constant has a fixed value. As the temperature rises, so does its worth. It is independent of the reactant concentrations at the initiation.
APPEARS IN
RELATED QUESTIONS
A first order reaction has a rate constant 1.15 × 10−3 s−1. How long will 5 g of this reactant take to reduce to 3 g?
Time required to decompose SO2Cl2 to half of its initial amount is 60 minutes. If the decomposition is a first order reaction, calculate the rate constant of the reaction.
With the help of an example explain what is meant by pseudo first order reaction.
In the first order reaction, half of the reaction is complete in 100 seconds. The time for 99% of the reaction to occurs will be
The reaction X → product
Follow first order of kinetics. In 40 minutes the concentration of 'X' changes from 0.1 m to 0.025. M. The rate of reaction when concentration of X is 0.01 m is.
Time required to decompose SO2Cl2 to half of its initial concentration is 60 minutes. If the de-composite is a first order reaction, calculated the rate constant of the reaction-
The decomposition of formic acid on gold surface follows first-order kinetics. If the rate constant at 300 K is 1.0 × 10−3 s−1 and the activation energy Ea = 11.488 kJ mol−1, the rate constant at 200 K is ______ × 10−5 s−1. (Round off to the Nearest Integer)
(Given R = 8.314 J mol−1 K−1)
The reaction \[\ce{SO2Cl2(g) -> SO2(g) + Cl2(g)}\] is a first-order gas reaction with k = 2.2 × 10−5 sec−1 at 320°C. The percentage of SO2Cl2 is decomposed on heating this gas for 90 min, is ______%.
The following data were obtained during the decomposition of SO2Cl2 at the constant volume. SO2Cl2 →SO2(g) + Cl2(g)
| Time (s) | Total Pressure (bar) |
| 0 | 0.5 |
| 100 | 0.6 |
Calculate the rate constant of the reaction.
The rate constant for the reaction:
\[\ce{2N2O_{(s)} ->2N2O4_{(g)}}\] is 4.98 × 10-4 s-1.
The order of the reaction is ______.
