Lời giải:

a. Ta có: \(Q = \frac{m}{\mu }.{C_p}.\Delta T = {C_p}\Delta T\)

              \({C_p} = \frac{Q}{{\Delta T}} = \frac{2}R \Rightarrow i = 3\)

              \(\gamma = \frac{i} = 1,67\)

b. \(\Delta U = \frac{i}{2}.R.\Delta T = 0,72MJ\)

c. \(A = \Delta U - Q = - 0,48MJ\)( sinh công )