Question

If ethanol dissolves in water then which of the following would happen?

• A. Liberation of heat and an increase in volume
• B. Absorption of heat and an increase in volume
• C. Liberation of heat and contraction
• D. Absorption of heat and contraction

Answer 1

The correct option is B

Absorption of heat and an increase in volume

$C_2{H}_{5}OH+H_{2}O$ forms a non-ideal solution showing positive deviation from Raoult’s law. Hence $\Delta H=+ve$ and $\Delta V=+ve$.

i.e., Absorption of heat with an increase in volume.