Second Law of Thermodynamics

Unit of entropy is:

$2 \mathrm{mol}$ of an ideal gas at  $27°\mathrm{C}$ temperature is expanded reversibly from $2 \mathrm{L}$ to $20 \mathrm{L}$. Find the entropy change. $\left(\mathrm{R}=2 \mathrm{cal}/\mathrm{mol} \mathrm{K}\right)$    

Calculate the average molar heat capacity at constant volume of gaseous mixture contained 2 more of each of two ideal gases.

$\left[\mathrm{A}\right({\mathrm{C}}_{\mathrm{v},\mathrm{m}}=\frac{3}{2}\mathrm{R})$ and $\mathrm{B}({\mathrm{C}}_{\mathrm{v},\mathrm{m}}=\frac{5}{2}\mathrm{R})]$

Derive the formula for entropy change during mixing of ideal gases at constant temperature and pressure.

Write about the entropy change involved in transition of one crystalline phase into another.

What is the entropy change involved in the phase transition of water from liquid state to vapour state?

Describe the entropy change during phase transition.

How can you relate carnot cycle with second law of thermodynamics?

Carnot cycle can be related to second law of thermodynamics.

According to the Kelvin–Planck statement, the efficiency of heat engine is given by equation: $\mathrm{\eta }=2-\frac{{\mathrm{Q}}_{\mathrm{L}}}{{\mathrm{Q}}_{\mathrm{H}}}$

Derive equation of efficiency of heat engine from Kelvin–Planck statement.

Describe Kelvin–Planck statement.

The expression for Clausius inequality is: $\oint \frac{\mathrm{dQ}}{\mathrm{T}}\le 0$

Describe Clausius inequality.

According to Clausius inequality is: $\oint \frac{\mathrm{dQ}}{\mathrm{T}}\ge 0$

According to Second Law of Thermodynamics, whenever a spontaneous process takes place, it is always accompanied by an increase in total entropy of the universe.

What is the scope of second law of thermodynamics?

Second law of thermodynamics can be used to predict:

Second law of thermodynamics can be used to predict _____ (spontaneity/enthalpy) of the process.