A change in the free energy of a system at constant temperature and pressure will be:
`Delta_(sys)G = Delta_(sys)H -T Delta_(sys)S`
At constant temperature and pressure
`Delta_(sys) G lt 0` (spontaneous)
`Delta_(sys)G = 0` (equilibrium)
`Delta_(sys)G gt 0` (non-spontaneous)
For a system in equilibrium, `DeltaG = 0`, under conditions of constant

Options

A. Temperature and pressure
B. Pressure and volume
C. Temperature and volume
D. Energy and volume

Explanation

To solve the question regarding the change in free energy of a system at constant temperature and pressure, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Gibbs Free Energy Equation**:
The Gibbs free energy change (ΔG) of a system is given by the equation:
\[
\Delta G = \Delta H - T \Delta S
...