Question

A vessel contains 1 mole of O₂ gas (molar mass 32) at a temperature T. The pressure of the gas is P. An identical vessel containing one mole of He gas (molar mass 4) at a temperature 2T has a pressure of –

• A. P/8
• B. P
• C. 2P
• D. 8P

Answer 1

Answer: (C)

2P

Answer 2

P₁V = n₁RT ; P₂V = n₂R2T

$\frac{P_{1}}{P_{2}} = \frac{1}{2}$ Ž $\frac{P}{P_{2}} = \frac{1}{2}$ Ž P₂ = 2P