Entropy Change for Ideal Gas

Entropy Change for Ideal Gas

### Formula

$$\Delta S=nC_V\ln\frac{T_2}{T_1}+nR\ln\frac{V_2}{V_1}$$

### Alternative Form

$$\Delta S=nC_P\ln\frac{T_2}{T_1}-nR\ln\frac{P_2}{P_1}$$

### Terminologies

- n → Number of moles.

- CP → Heat capacity at constant pressure.

- CV → Heat capacity at constant volume.

- P → Pressure.

- V → Volume.

### Usage

- Used in entropy calculations of gases.