`He,N_(2)`, and `O_(3)` are expanded adiabatically and their expansion curves between `P` and `V` are plotted under silimar conditions. About the ratio of the slope, which one is not correct?

Options

A. the ratio of slopes of P-V curves for He and `O_(3)` is 1.25
B. the ratio of slopes of P-V curves for He and `N_(2)` is 1.20
C. the ratio of slopes of P-V curves for `N_(2)` and `O_(3)` is 1.05.
D. the slope of He is least steeper and for `O_(3)` is most steeper.

Answer

A, B, C

Explanation

Ratio of slope `= (gamma "for gass I")/(gamma "for gas II")`, slope for He, `N_(2)` and `O_(3)` are 7/5, 5/4 and 4/3 respectively.
`G^(@) = DeltaH^(@) - T Delta S^(@) Delta H^(@)`