Temperature Dependence of Reaction Rates (Arrhenius Equation)

IMPORTANT

Temperature Dependence of Reaction Rates (Arrhenius Equation): Overview

This topic covers concepts, such as, Temperature Coefficient etc.

Important Questions on Temperature Dependence of Reaction Rates (Arrhenius Equation)

HARD
IMPORTANT

If the definition of the temperature coefficient of the reaction holds good for a reaction between 27°C and 37°C, the activation energy for the reaction in kJ.mol-1 is

MEDIUM
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What is the increase in rate of the reaction, on raising the temperature by 25°C if the temperature coefficient of a reaction is 3?

HARD
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The temperature coefficient of the rate of a reaction is 2.3. How many times will the rate of the reaction increase if the temperature is raised by 25K? Give answer to the nearest integer.

HARD
IMPORTANT

The rate of a reaction is doubled for every 10oC rise in temperature. The increase in reaction rate as a result of temperature rise from 10oC to 100oC is

HARD
IMPORTANT

Consider two reactions having same Arrhenius factor A, but different energies of activation.
(i) AB; Ea1=20 kJ
(ii) CD; Ea2=30 kJ
Both are at temperature 25°C
If temperature in both reaction is increased slightly in such a way that change in temperature in both case is same then, choose the correct option.

HARD
IMPORTANT

Two first order reactions proceed at 25 °C temperature at the same rate. Temperature coefficient of the first reaction is 2 and that of second reaction is 3 . Find the ratio of the rate of these reaction at 75 o C .

EASY
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At a given temperature, the energy of activation of two reactions is same if :

MEDIUM
IMPORTANT

The rate constant of a first order reaction is 103 min-1 at 300 K. The temperature coefficient of the reaction is 2. What is the rate constant of the reaction at 350 K approximately?

MEDIUM
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If the rate of reaction grows 15.6 times on increasing the temperature by 30 K, the temperature coefficient of the reaction will be approximately:

EASY
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The temperature coefficient of a reaction is:

MEDIUM
IMPORTANT

The rate constant of a first order reaction is 10-3min-1 at 300 K. The temperature coefficient of the reaction is 2. What is the rate constant of the reaction at 350 K approximately?

HARD
IMPORTANT

By what factor does the rate of reaction increases when the temperature is increased from 30°C to 60°C?

MEDIUM
IMPORTANT

The rate of a chemical reaction doubled for every 10 rise in temperature. If the temperature is increased by 60 the rate of reaction increase by

EASY
IMPORTANT

The temperature coefficient of most of the reactions lies between which of the following ranges?

MEDIUM
IMPORTANT

Find out the temperature coefficient of most of the reactions lies between:

EASY
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Temperature coefficient of a reaction is 2. When temperature is increased from 30 to 100, rate of the reaction increases by

EASY
IMPORTANT

The rate constant of a first order reaction at 27 is 10-3 min-1. The temperature coefficient of this reaction is 2. What is the rate constant (in min-1) at 17 for this reaction?

MEDIUM
IMPORTANT

The activation energy for most of the reactions is approximately 50 kJ mol-1. The value of temperature coefficient for such reactions is:

EASY
IMPORTANT

The velocity constant of a reaction at 290 K was found to be 3.2×10-3at 300 K, it will be:

MEDIUM
IMPORTANT

In a zero-order reaction for every 10oC rise of temperature the rate is doubled. If the temperature is increased from 10o C to 100o C, the rate of the reaction will become: