The rate constant for zero order reaction is where C 0 and C t are concentrations of reactant at respective times.

For a zero-order reaction d t d C = − k or ∫ C 0 C t d C = k ∫ 0 t d t C 0 − C t = k t k = t C 0 − C t

Start Free Mock LoginAlready registered? Login here

Chemistry - Chemical Kinetics Question with Solution | TestHub

ChemistryChemical KineticsZero Order ReactionsMedium2 minQB

ChemistryMediumsingle choice

Passage / Comprehension

The rate of a chemical reaction is significantly affected by a change in temperature. For most chemical reactions, the rate usually doubles or triples for each 10°C rise in temperature. This occurs because an increase in temperature increases the number of effective collisions. Consequently, the fraction of molecules possessing energy greater than or equal to the threshold energy increases appreciably, resulting in a significant increase in the reaction rate. The quantitative dependence of reaction rate on temperature is given by the Arrhenius equation:

$k = A exp (- \frac{E _{a}}{RT})$

In this equation, $E_{a}$ is the activation energy of the reaction. (antilog 0.3931 = 2.472)

The rate constant for zero order reaction is

where C₀ and C_t are concentrations of reactant at respective times.

Options:

Answer:

Solution:

For a zero-order reaction

$\frac{d C}{d t} = - k$

$\int_{C_{0}}^{C_{t}} d C = k \int_{0}^{t} d t$

$C_{0} - C_{t} = k t$

$k = \frac{C _{0} - C _{t}}{t}$

Stream:JEESubject:ChemistryTopic:Chemical KineticsSubtopic:Zero Order Reactions

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...