Question

A gas at a certain volume and temperature has pressure 75 cm. If the mass of the gas is doubled at the same volume and temperature, its new pressure is

• A. 37.5 cm
• B. 75 cm
• C. 150 cm
• D. 300 cm

Answer 1

Answer: (C)

150 cm

Answer 2

$P = \frac{1}{3}\frac{M}{V}v_{rms}^{2}$ ∴ $P \propto \frac{MT}{V}$

At constant volume and temperature, if the mass of the gas is doubled then pressure will become twice.