Question

Activation energy of any chemical reactions can be calculated if one knows the value of:

Options

• Orientation of reactant molecules during collision.

• Rate constant at two different temperatures.

• Rate constant at standard temperatures.

• Probability of collision.

Answer 1

Rate constant at two different temperatures.

Explanation:

Activation energy of a chemical reaction can be determined by evaluating rate constants at two different temperatures.

By Arrhenius equation:

`log  (K_2)/K_1 = E_a/(2.303 R) log((T_2 - T_1)/(T_1T_2))`