Question

13.
An open vessel at a temperature of 10°C is heated at constant pressure
to 400°C. What fraction of the weight of air originally contained in
the vessel is to be expelled?
[Ans: 0.579 of Vid]
as lindorontoinina oling
con withotand un to pressure​

Answer 1

Explanation:

As the vessel is open, the pressure remains constant.

There is no change in the volume of the vessel. Hence, the volume also constant.

ACC to ideal gas equation, PV=nRT

n1+1T1=300K  n2=?T2=400K

n2n1=T1T2   (At constant P,V)

x1=300/400

Fraction of air present in vessel after heating =4/3.

Fraction of air getting out of the vessel =1−4/3=4/1