Question

100 $mL$ of gas is collected at 750 $mm$ pressure. What volume will it occupy at 745 $mm$ pressure?(If temperature is constant)

• A. $V=100.67mL$
• B. $V=195mL$
• C. $V=201.34mL$
• D. $V=303.74mL$

Answer 1

The correct option is A $V=100.67mL$

Given
$V_1=100mL$
$P_1=750mm$
$V_2=?$
$P_2=745mm$
$\therefore P_1{V}_1=P_2{V}_2$
or $V_2=\frac{P_1{V}_1}{P_2}$

$=\frac{750\times 100}{745}$
$\therefore V_2=100.67mL$