Question

For an ideal gas with constant properties undergoing a quasi-static process, which one of the following represents the change of entropy $\left(\Delta s\right)$ from stae $1$ to $2$?

• A. $\Delta s=c_{p}ln\left(\frac{T_2}{T_1}\right)-c_{v}ln\left(\frac{P_2}{P_1}\right)$
• B. $\Delta s=c_{v}ln\left(\frac{T_2}{T_1}\right)+R_{l}n\left(\frac{V_1}{V_2}\right)$
• C. $\Delta =c_{p}ln\left(\frac{T_2}{T_1}\right)-Rln\left(\frac{P_2}{P_1}\right)$
• D. $\Delta s=c_{v}ln\left(\frac{T_2}{T_1}\right)-c_{p}ln\left(\frac{V_2}{V_1}\right)$

Answer 1

The correct option is C $\Delta =c_{p}ln\left(\frac{T_2}{T_1}\right)-Rln\left(\frac{P_2}{P_1}\right)$

$\Delta =c_{p}ln\left(\frac{T_2}{T_1}\right)-Rln\left(\frac{P_2}{P_1}\right)$