An open flask containing air is heated from 300 K to 500 K. What percentage of air will be escaped to the atmosphere, if pressure is keeping constant?

Explanation

Volume(i of the liquid `= ((148- 50)g)/(0.98 gmol^(-1)) = 100 ml = 0.1` litre
This is the volume of the vessel and hence the volume of the gas. For ideal gas,
`PV = nRT = (w)/(M) RT`
or `M = (wRT)/(PV) = (0.5g xx 0.082L atm K^(-1) mol^(-1) xx 300K)/(1 atm xx 0.1 L) = 123 gmol^(-1)`