Entropy Change in Isobaric Process

Q.

Which of the following is the correct expression of $\Delta S$ for an isobaric process?

1. $\Delta S=n{C}_{P}ln\frac{T_2}{T_1}+nRln\frac{V_2}{V_1}$

2. $\Delta S=n{C}_{p}ln\frac{T_2}{T_1}$

3. $\Delta S=n{C}_{p}ln\frac{T_1}{T_2}$

4. None of these

Q. Find out the change in entropy $\Delta SinJ{K}^{-1}$ when 4 mol of Helium gas is isobarically heated from $250Kto350K$.
Assume $C_{p,m}=5.19kJmo{l}^{-1}{K}^{-1}$

1. 4812
2. 3950
3. 6989
4. 7050

Q.

Which of the following is the correct expression of $\Delta S$ for an isobaric process?

1. $\Delta S=n{C}_{P}ln\frac{T_2}{T_1}+nRln\frac{V_2}{V_1}$

2. $\Delta S=n{C}_{p}ln\frac{T_2}{T_1}$

3. $\Delta S=n{C}_{p}ln\frac{T_1}{T_2}$

4. None of these

Q. Find out the change in entropy $\Delta SinJ{K}^{-1}$ when 4 mol of Helium gas is isobarically heated from $250Kto350K$.
Assume $C_{p,m}=5.19kJmo{l}^{-1}{K}^{-1}$

1. 4812
2. 3950
3. 6989
4. 7050