Question 3.304E: Ammonia, NH3, is contained in a sealed rigid tank at 30 F, x...

Continuity Eq.:      m _{2}= m _{1};

Energy Eq.3.5:      E _{2}- E _{1}={ }_{1} Q _{2} ; \quad\left({ }_{1} W _{2}=0\right)

Process:    V _{2}= V _{1} \Rightarrow v _{2}= v _{1}=0.02502+0.5 \times 4.7945=2.422   ft ^{3} / lbm

State 1: Table F.8.1,    u _{1}=75.06+0.5 \times 491.17=320.65   Btu / lbm

Table F.8.2:    v _{2}    \&    T _{2} \Rightarrow    between 150 psia and 175 psia

P _{2}=163   lbf / in ^{2}, \quad u _{2}=633.5   Btu / lbm    linear interpolation

Process equation gives no displacement: { }_{1} w _{2}= 0;

The energy equation then gives the heat transfer as

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Eq.3.5 :  E_{2}-E_{1}={ }_{1} Q_{2}-{ }_{1} W_{2}