Trong quá trình B → C, khí thu nhiệt:

Đáp án B

\(\Delta {U_{AB}} = \frac{3}{2}nR\left( {{T_B} - {T_A}} \right) = \frac{3}{2}\left( {{p_B}{V_B} - {p_A}{V_A}} \right) = \frac{3}{2}\left( {{p_0}{V_0} - 4{p_0}.4{V_0}} \right) = - 22,5{p_0}{V_0}\)

Quá trình B → C

\({Q_{BC}} = \Delta {U_{BC}};{T_C} = {T_A} = > {Q_{BC}} = \Delta {U_{BA}} = - \Delta {U_{AB}} = 22,5{p_0}{V_0}\).