Question

If the temperature of 1 mol of a gas increases by 20%, then its volume at constant pressure:

• A. Increases by 20%
• B. Decreases by 20%
• C. Increases by 80%
• D. Decreases by 17%

Answer 1

The correct option is A Increases by 20%

From Charles' law,
$\frac{V_1}{T_1}=\frac{V_2}{T_2}$
$\Rightarrow \frac{V_1}{T}=\frac{V_2}{1.2T}$
$\Rightarrow V_2=1.2V_1$