Identify the true statement from the following statements on factor/s affecting the spontaneity of a reaction.

• A. The enthalpy of a reaction is the sole determining factor as to whether the reaction will be spontaneous or nonspontaneous.
• B. The change in enthalpy or heat and the entropy change of the reaction both affect the spontaneity of a reaction.
• C. Only the change in the degree of disorder determines the spontaneity of a reaction.
• D. Neither the enthalpy change nor the entropy change affects the spontaneity of a reaction since the number of molecules interacting determines spontaneity.

Answer: (B)