Heat and Thermodynamics

Solved Problems

Q 1. Calculate the temperature of inversion of hydrogen where cooling effect would vanish from the following data assuming that the gas obeys Van der Waals’ equation.

Critical temperature of hydrogen = 33.18 K

Critical pressure of hydrogen = 12.80 atmospheres

Ans. We have

 

 

or

 

 

Density of hydrogen = 0.08987 gm/litre

Gram- Molecular Volume of hydrogen = v =

Substituting the value in Eq. 7.15,

 

 

 

or

 

T_o = 223.8K ...