The pressure-volume of varies thermodynamic process is shown in graphs:

Work is the mole of transference of energy. It has been observed that reversible work done by the system is the maximum obtainable work.
`w_(rev) gt w_(irr)`
The works of isothermal and adiabatic processes are different from each other.
`w_("isothermal reversible") = 2.303 nRT log_(10) ((V_(2))/(V_(1)))`
`= 2.303 nRT log_(10)((P_(2))/(P_(1)))`
`w_("adiabatic reversible") = C_(V) (T_(1)-T_(2))`
`P-V` plots for two gases during adiabatic processes are given in the given figure:

Plot `D` and Plot `C` should correspond to

Options

A. `He` and `O_(2)`
B. `He` and `Ar`
C. `O_(2)` and `He`
D. `O_(2)` and `N_(2)`

Explanation

Slope of the adiabatic curve `prop gamma`
Slope of `B gt` slope of `A`
`He (gamma = 1.66), O_(2) (gamma = 1.44)`