Question

Which of the following statements is TRUE?
A. Endothermic processes decrease the entropy of the surroundings, at constant T and P.
B. Endothermic processes are never spontaneous.
C. Entropy is not a state function.
D. Exothermic processes are always spontaneous.
E. None of the above are true.

Answer 1

Answer: Option (A) is the correct answer.

Explanation:

Entropy means the degree of randomness present within the molecules of a substance.

And, in an endothermic process heat is absorbed by the reactant molecules. So, when heat is absorbed from the surroundings then there occurs a decrease in heat energy of the surrounding.

As a result, kinetic energy of surrounding elements decreases due to which there is also decrease in the entropy of surroundings.

As spontaneous process is a process that occurs on its own. So, it can be endothermic or exothermic in nature.

A state function is defined as a function that depends on the initial and final states.

Thus, we can conclude that the statement endothermic processes decrease the entropy of the surroundings, at constant T and P, is true.