Which of the following is the correct expression for an irreversible process?

One mole of which of the following has the highest entropy?

When disorder of a system increases,the change is said to be

The entropy change when $2 \, \text{moles}$ of an ideal monoatomic gas is heated from $200 \, ^\circ \text{C}$ to $300 \, ^\circ \text{C}$ isochorically is:

At $10\, ^oC$,$1\, mol$ of an ideal gas is allowed to expand reversibly and adiabatically from $10\, L$ to $200\, L$. Calculate the change in entropy in $cal/K$.

The entropy change involved in the conversion of $1 \, \text{mole}$ of liquid water at $373 \, K$ to vapour at the same temperature will be $[\Delta H_{vap} = 2.257 \, kJ/g]$. (in $, kJ/K$)