1. Tardigrade
  2. Question
  3. Chemistry
  4. A box contains 0.90 g of liquid water in equilibrium with water vapour at 27° C. The equilibrium vapour pressure of water at 27° C 32.0 Torr. When the volume of the box is increased, some of the liquid water evaporates to maintain the equilibrium pressure. If all the liquid water evaporates, then the volume of the box must belitre. [nearest integer] (Given: R =0.082 L atm K -1 mol -1 ) (Ignore the volume of the liquid water and assume water vapours behave as an ideal gas.)

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A box contains $0.90\, g$ of liquid water in equilibrium with water vapour at $27^{\circ} C$. The equilibrium vapour pressure of water at $27^{\circ} C 32.0$ Torr. When the volume of the box is increased, some of the liquid water evaporates to maintain the equilibrium pressure. If all the liquid water evaporates, then the volume of the box must be__litre. [nearest integer]
(Given: $R =0.082 \, L$ atm $K ^{-1}\, mol ^{-1}$ )
(Ignore the volume of the liquid water and assume water vapours behave as an ideal gas.)

JEE MainJEE Main 2022States of Matter

Solution:

$V =\frac{ nRT }{ P }=\frac{0.90 \times 0.82 \times 300 \times 760}{18 \times 32}=29.21$