Question

When pressure is constant, volume of a gas at $0^{o}C$ is doubled at:

• A. 273K
• B. ${273}^{o}C$
• C. ${546}^{o}C$
• D. ${127}^{o}C$

Answer 1

The correct option is B ${273}^{o}C$

According to Charle's law, at constant pressure, volume is directly proportional to the temperature of the gas.

$V\propto T\frac{V_1}{T_1}=\frac{V_2}{T_2}$

Given, at 0℃ (273 K) the volume is V

$\frac{V_1}{T_1}=\frac{V_2}{T_2}⟹\frac{V}{273}=\frac{2V}{T_2}⟹T_2=546K\therefore T_2=273℃$