Question

If 300 ml of a gas at $27 ^ { \circ } \mathrm { C }$ is cooled to at constant pressure, then its final volume will be

• A. 540 ml
• B. 350 ml
• C. 280 ml
• D. 135 ml

Answer 1

Answer: (C)

280 ml

Answer 2

$V \propto T$ at constant pressure

⇒ $\frac { V _ { 1 } } { V _ { 2 } } = \frac { T _ { 1 } } { T _ { 2 } }$ ⇒ $V _ { 2 } = \frac { V _ { 1 } T _ { 2 } } { T _ { 1 } } = \frac { 300 \times 280 } { 300 } = 280 \mathrm { ml }$.