Entropy Change in Isobaric Process

Q. What is the entropy change in $2mol{N}_2$ when its temperature is taken from $400K$ to $800K$, at constant pressure?

1. $30J/K$
2. $60J/K$
3. $40J/K$
4. $20J/K$

Q. Calculate the change in entropy of 1 mole of ideal gass, when temperature is lower down to 1/8 of initial temperature at constant volume is ?

1. $-3C_p\ln 2$
2. $-3C_p\ln 2$
3. $-3C_v\ln 2$
4. $3C_v\ln 2$

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. None of these

2. 

3. 

4. 

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.

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. Assertion :$C+\frac{1}{2}{O}_2⟶CO;\Delta H=-26.0kcal$
$C{O}_2+\frac{1}{2}{O}_2⟶C{O}_2;\Delta H=-68.3kcal$
$C+O_2⟶C{O}_2;\Delta H=-94.3kcal$ Reason: This is an experimental proof of Hess's law.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect but Reason is correct