JAMB Physics 2024 Paper

Using the general gas equation;

$\frac{P_1 \times V_1}{T_1}$ = $\frac{P_2 \times V_2}{T_2}$

P$_1$ = P, P$_2$ = 2P, T$_1$ = 27ºC → 300K, T$_2$ = 127ºC → 400k,

V$_2$ = $\frac{P_1 \times V_1 \times T_2}{T_1 \times P_2}$

V$_2$ = $\frac{P \times V_1 \times 400}{300 \times 2P}$ = $\frac{2V_1}{3}$

ΔV = V$_1$ - $\frac{2V_1}{3}$ = $\frac{V_1}{3}$

Therefore, The volume decreases by $\frac{1}{3}$ of the original volume.