Question

Which of the following statements is correct for the spontaneous adsorption of a gas ?
(a) $\Delta S$ is negative and, therefore, $\Delta H$ should be highly positive
(b) $\Delta S$ is negative and therefore, $\Delta H$ should be highly negative
(c) $\Delta S$ is positive and, therefore, $\Delta H$ should be negative
(d) $\Delta S$ is positive and, therefore, $\Delta H$ should also be highly positive

Answer 1

c because for a spontaneous process entropy change will be positive and enthalpy change will negetive

Answer 2

Answer: a) Delta S is negative and, therefore, Delta H should be highly positive is the correct answer.

Explanation:

Spontaneous process is that process which takes place on its own without any external influence.

Spontaneous process is a natural process.

It occurs under the specified set of conditions.

For spontaneous process Delta H should be less

And Delta A should be more.

We will check all options

a) Delta S is negative and, therefore, Delta H should be highly positive

It is correct

(b) \Delta S is negative and therefore, \Delta H should be highly negative

It is incorrect

(c) \Delta S is positive and, therefore, \Delta H should be negative

It is incorrect

(d) \Delta S is positive and, therefore, \Delta H should also be highly positive

It is correct