Four moles of an ideal gas expand isothermally from 1 litre to 10 litres are 300 K. Calculated the change in free energy of the gas `(R 8.314 JK^(-1)mol^(-1))`.

Explanation

To calculate the change in free energy (ΔG) of the gas during an isothermal expansion, we can follow these steps:

### Step 1: Understand the process
In an isothermal process, the temperature remains constant. For an ideal gas, the change in enthalpy (ΔH) during an isothermal expansion is zero because there is no change in temperature.

### Step 2: Calculate ΔH
Since the process is isothermal:
\[
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