Select the correct statement

Options

A. There is a natural asymmetry between converting work to heat and converting heat to work.
B. No process is possible in which the sole result is the absorption of heat from a reservoir and its complete conversion into work.
C. For energy chemical reaction at equilibrium, standard change in Gibbs free energy is zero.
D. At constant temperature and pressure, chemical reactions are spontaneous in the direction of decreasing Gibbs energy..

Explanation

`DeltaG =- ve` for spontaneous process and `DeltaG^(Theta) != 0` at equilibrium. Statement (b) represents Carnot theorem.