Question

When gases are heated from $300K$ to $600K$ at constant pressure, the volumes:

• A. increase by the same magnitude
• B. become double
• C. increase in the ratio of their molecular masses
• D. increase but to different extent

Answer 1

Answer: (A), (B)

increase by the same magnitude
become double

When gases are heated from ${20}^{\circ }C$ to ${40}^{\circ }C$ at constant pressure, the volumes becomes double.
$PV=nRT$
Hence, $V\propto T$
Thus, when temperature is doubled, volume is also doubled.