Question

Identify the correct statement regarding a spontaneous process:
(i) Lowering of energy in the process is the only criterion for spontaneity.
(ii) For a spontaneous process in an isolated system, the change in entropy is positive.
(iii) Endothermic processes are never spontaneous.
(iv) Mostly of the exothermic processes are spontaneous.

• A. only (i)
• B. (ii) and (iv)
• C. (i) and (ii)
• D. (i) and (iii)

Answer 1

Answer: (B)

Spontaneity of reaction depends on tendency to acquire minimum energy state and maximum randomness. For a spontaneous process in an isolated system, the change in entropy is positive.