p(atm)
Q
10P 2
3
P
T₁
0
V
V (m³)
0
A Brayton-cycle heat engine with diatomic gas follows the cycle shown in Figure (1-2 and 3-4 are adiabatic processes). The heat input from the burning fuel is 2.25 MJ per cycle. Determine the engine's thermal efficiency (in percent) by explicitly computing the work done per cycle. P=1.35 atm, $T_1$=334 K, V=2.78 m³.