MCQ
One mole of helium is adiabatically expanded from its initial state $\left(P_i, V_i, T_i\right)$ to its final state $\left(P_f, V_f, T_f\right)$. The decrease in the internal energy associated with this expansion is equal to
- ✓$C_V\left(T_i-T_f\right)$
- B$C_P\left(T_i-T_f\right)$
- C$\frac{1}{2}\left(C_P+C_V\right)\left(T i-T_f\right)$
- D$\left(C_P-C_V\right)\left(T_i-T_f\right)$
