Select the correct statement

Options

A. (a) There is a natural asymmetry between converting work to heat and converting heat to work.
B. (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. (c) For energy chemical reaction at equilibrium, standard change in Gibbs free energy is zero.
D. (d) At constant temperature and pressure, chemical reactions are spontaneous in the direction of decreasing Gibbs energy..

Explanation

To solve the question of selecting the correct statement from the given options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Analyze Statement A**:
- The statement claims there is a natural asymmetry between converting work to heat and converting heat to work.
- According to the second law of thermodynamics, while it is possible to convert work into heat with 100% efficiency, converting heat into work cannot achieve 100% efficiency. Therefore, this statement is **correct**.

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