Question

To expel half the mass of air from a large flask at ${27}^{\circ }$C, it must be heated to

• A. 54°C
• B. 177°C
• C. 277°C
• D. 327°C

Answer 1

The correct option is D

327°C

PV = nRT

at cosntant t P and V

$n_1{T}_1$ = $n_2{T}_2$

$n_1$ $\times$ 300 = $\frac{n_1}{2}$ $\times$ T

$\therefore$ T = 600K = ${327}^{\circ }$ C