Question

At a constant temperature, a gas occupies a volume of 200 mL at a pressure of 0.720 bar. It is subjected to an external pressure of 0.900 bar. What is the resulting volume (mL) of the gas?

• A. 160 mL
• B. 100 mL
• C. 150 mL
• D. 158 mL

Answer 1

The correct option is A 160 mL

Given: T = constant
At initial condition, $V_1=200mL,P_1=0.720bar$
At final condition, $P_2=0.900bar,V_2=?$
According to Boyle' law,
$P_1{V}_1=P_2{V}_2$
$V_2=\frac{P_1{V}_1}{P_2}$ = $\frac{0.720\times 200}{0.900}$
$V_2=160mL$
The resulting volume of the gas is 160 mL.