The normal boiling point and ΔHvap of a liquid 'X' are 400 K and 40kJ mol^-1 respectively. Assuming — AITS & Test Series Chemistry Question

Question

The normal boiling point and ΔHvap of a liquid 'X' are 400 K and 40kJ mol^-1 respectively. Assuming ΔHvap to be constant, which of the following is correct? (I) ΔSvap > 100 JK^-1 mol^-1 at 400 K and 0.5 atm (II) ΔSvap < 100 JK^-1 mol^-1 at 400 K and 1 atm (III) ΔSvap < 100 JK^-1 mol^-1 at 400 K and 2 atm (IV) ΔSvap = 100 K JK^-1 mol^-1 at 400 K and 1 atm