QuestionReal gases / van der Waals
The ratio of Boyle’s temperature (TB) and critical temperature (TC) of a gas obeying van der Waals equation is given by:
- (a) TB : TC = 27: 8
- (b) TB : TC = 4: 27
- (c) TB : TC = 3: 2
- (d) TB : TC = 8: 27
Answer: (a) TB : TC = 27: 8
TB = a/(Rb); TC = 8a/(27Rb). TB/TC = 27/8 → 27 : 8 → (a). Remember: Ti (inversion) = 2a/(Rb) = 2TB.