An ideal gas may expands from `V_(0)` to `2V_(0)` according to following three processes. Molar specific heat for processes `b` will be

Options

A. positive if `a` is isothermal and `c` is adiabatic processes
B. negative if `a` is isothermal and `c` is adiabatic processes
C. positive if `c` is isothermal and `c` is adiabatic processes
D. negative if `c` is isothermal and `a` is adiabatic processes

Answer

B

Explanation

If a is isothermal and `c` is adiabatic processes then for `b DeltaU` will be negative and `Q` be positive so specific heat will be negative.