Identify the correct statement in a chemical reaction-

Options

A. the entropy always increases
B. the change in entropy along with suitable change in enthalpy decides the rate of reaction
C. the enthalpy always decreases
D. both the enthalpy and the entropy remains constant

Answer

B

Explanation

For a reaction occurring at a constant temperature and pressure, `DeltaG lt 0,` i.e., `DeltaH-TDeltaS lt0`. So, the change in entropy `(DeltaS)` along with the change in enthalpy `(DeltaH)` determines the spontaneity of a reaction.