2022 Kinetic TheoryIdeal Gas Equation and Molar Volume Medium Question 9 of 34 in Kinetic Theory

The volume occupied by the molecules contained in 4.5 kg water at STP, if the intermolecular forces vanish away is :

A $5.6\ m^3$
B $5.6\times10^6\ m^3$
C $5.6\times10^3\ m^3$
D $5.6\times10^{-3}\ m^3$

The answer is A.

Solution

If intermolecular forces vanish, water behaves like an ideal gas at STP (1 mole occupies 22.4 L). $V = (no.\ of\ moles) \times 22.4 \times 10^{-3}\ m^3 = \frac{mass}{molar\ mass} \times 22.4 \times 10^{-3}\ m^3$ $V = \frac{4.5 \times 10^3}{18} \times 22.4 \times 10^{-3} = 5.6\ m^3$

Concept volume of water molecules as gas at STP

Kinetic Theory in past papers

34 questions from this chapter have appeared across 19 exam years.