Answer
1. C
2. B
3. D
4. D
5. A
Work Step by Step
1. $c_p=c_v+R\rightarrow (0.7+0.3)kJ/kg.K=1.0 kJ/kg.K$
$\Delta h=c_p\Delta T=1.0\ kJ/kg.K\times100K=100kJ/kg$
2. $\Delta u=c_v\Delta T=0.7\ kJ/kg.K\times100K=70kJ/kg$
3,4. Not enough information about the process.
5. $\Delta h = \Delta u + \Delta (Pv)$
$\Delta (Pv)=30\ kJ/kg$
