Question

100 mL of gas is collected at 750 mm pressure. What volume will it occupy at 745 mm pressure?

• A. $V=100.67mL$
• B. $V=200.3mL$
• C. $V=300mL$
• D. None of these

Answer 1

Answer: (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 $V_2=\frac{P_1{V}_1}{P_2}=\frac{750\times 1000}{745}mL$

$\therefore V_2=100.67mL$