Q. If $300\ ml$ of a gas at $27℃$ is cooled to $7℃$ at constant pressure, then its final volume will be
A) $540\ ml$
B) $350\ ml$
C) $280\ ml$
D) $135\ ml$
Explanation
(c) $V \propto T$ at constant pressure
$\Rightarrow \frac{V_{1}}{V_{2}} = \frac{T_{1}}{T_{2}} \Rightarrow V_{2} = \frac{V_{1}T_{2}}{T_{1}} = \frac{300 \times 280}{300} = 280\ ml$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.