List of top Chemistry Questions on Temperature Dependence of the Rate of a Reaction

Assertion (A): Rate of reaction increases with an increase in temperature.
Reason (R): Number of effective collisions decreases with an increase in temperature.

The rate of a particular reaction quadruples when the temperature increases from 300 K to 320 K. Calculate the energy of activation \( (E_a) \) of the reaction assuming that it does not change with temperature.
(Given : \( \log 4 = 0 \cdot 60, R = 8 \cdot 314 \text{ JK}^{-1} \text{ mol}^{-1} \))

The rate of the chemical reaction doubles when the temperature is raised from \(298\,K\) to \(308\,K\). Calculate activation energy \((E_a)\) for this reaction assuming that it does not change with temperature. (Given : \(R = 8.314\,J\,mol^{-1}\,K^{-1}\), \(\log 2 = 0.30\))

एक प्राथमिक रासायनिक अभिक्रिया के लिए, अभिगमन प्लॉट नीचे दिया गया है। यदि सक्रियण ऊर्जा \(6.64\,kJ\,mol^{-1}\) है और \(R=8.3\,J\,K^{-1}mol^{-1}\) है, तो वह तापमान जिस पर \(k\) का स्थिरांक \(e^2\,min^{-1}\) हो जाता है, वह है :

For an elementary chemical reaction, the Arrhenius plot is given below.

If the energy of activation is $6.64 \text{ kJ mol}^{-1}$ and $R = 8.3 \text{ J K}^{-1}\text{ mol}^{-1}$, the temperature at which the rate constant becomes $e^2 \text{ min}^{-1}$, is

Given below is an expression for the rate constant of a first order reaction occurring at a certain temperature \(T(K)\): \[ \ln k = 14.34-\frac{1.25\times10^4}{T} \] Given \(R=1.987\text{ cal mol}^{-1}\text{K}^{-1}\). The activation energy of the reaction is:

What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20°C to 35°C ? (R = 8.314 J mol^-1 K^-1)