Question

Identify the correct statement regarding a spontaneous process
1) For a spontaneous process in an isolated system, the change in entropy is positive
2) Endothermic process are never spontaneous
3) Exothermic processes are always spontaneous (4) Lowering of energy in the reaction process is the only criterion for spontaneity

Answer 1

Answer: 3) statement.

Spontaneous process are the process there is entropy of a system increases and decrease in enthalpy .In case of exothermic process, energy of the system decreases.