Question

A flask containing air is heated from 300 kelvin to 500 kelvin

Answer 1

Assume the flask to have a volume of 1L

Since the pressure is kept constant,

we have, V1/T1 =V2/T2 

V1 = 1L and T1 = 300K, T2 = 500K

Therefore V2 = 500/300 = 1.66 L i.e. the gas has expanded.

Since the volume of the flask can contain only 1L of air the remaining 0.66 L will escape i.e 39.75 %

Answer 2

Assume the flask to have a volume of 1L

Since the pressure is kept constant,

we have, V1/T1 =V2/T2 

V1 = 1L and T1 = 300K, T2 = 500K

Therefore V2 = 500/300 = 1.66 L i.e. the gas has expanded.

Since the volume of the flask can contain only 1L of air the remaining 0.66 L will escape i.e 39.75 %

Hope it helps you.