Cp−Cv=RC_p-C_v = RCp−Cv=R ...(1)
k=CpCvk = \frac{C_p}{C_v}k=CvCp ...(2)
From 1 and 2
R=1.49Cv−Cv=0.49CvR = 1.49C_v-C_v = 0.49C_vR=1.49Cv−Cv=0.49Cv
Cv=0.43050.49=0.8785C_v = \frac{0.4305}{0.49}=0.8785Cv=0.490.4305=0.8785 kJkgK\frac {kJ} {kg K}kgKkJ
Q=mCv△UQ = mC_v\triangle UQ=mCv△U
Q=2×0.8785×1458.01=2561.72kJQ =2 \times 0.8785 \times 1458.01 = 2561.72 kJQ=2×0.8785×1458.01=2561.72kJ
work done W=Q−△U=2561.72−1458.01=1103.71kJW = Q - \triangle U =2561.72 - 1458.01 =1103.71 kJW=Q−△U=2561.72−1458.01=1103.71kJ
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