Question

A certain mass of gas occupies a volume of 300 c.c. at 27C and 620 mm pressure. The volume of this gas at $V_{m} = 44.8$ and 640 mm pressure will be

• A. 400 c.c.
• B. 510 c.c.
• C. 310 c.c.
• D. 350 c.c.

Answer 1

Answer: (C)

310 c.c.

Answer 2

Given initial volume $V_{2}$, initial temperature $P_{1}$, initial pressure $T_{1}$, final temperature $T_{1}$and final pressure $T_{2}$.We know from the general gas equation

$\frac { P _ { 1 } V _ { 1 } } { T _ { 1 } } = \frac { P _ { 2 } V _ { 2 } } { T _ { 2 } }$ $\frac{T_{1}}{2P_{1}T_{2}}$ ⇒$\frac{2P_{1}T_{2}}{T_{1} + T_{2}}$