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# R134a is flowed into an insulated 0.2-m3 initially empty container from a line at 500 kPa, saturated vapor until the flow stops by itself. Find the final mass and temperature in the container and the total irreversibility in the process.

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We are given following data for R-134a flowed into empty container:

$P=500\text{ kPa}$

$V=0.2\text{ m}^3$

From Superheated R-134a table B.5.2. corresponding to $P_1=500\text{ kPa}$ we can find stage 1 saturated vapor specific entropy and enthalpy:

$h_1=407.45\frac{\text{ kJ}}{\text{ kg}}$

$s_1=1.7198\frac{\text{ kJ}}{\text{ kg K}}$

$T_1=T_{amb}=15.66\text{ C}=289\text{ K}$

From energy equation we know that inlet enthalpy is equal to exit specific internal energy:

$u_2=h_1=407.45\frac{\text{ kJ}}{\text{ kg}}$

From Superheated R-134a table B.5.2. corresponding to $P_2=500\text{ kPa}$ and $u_2=407.45\frac{\text{ kJ}}{\text{ kg}}$ we can find stage 2 specific entropy, volume and temperature:

$\nu_2=0.04656\frac{\text{ m}^3}{\text{ kg}}$

$s_2=1.7971\frac{\text{ kJ}}{\text{ kg K}}$

$T_2=\boxed{40\text{ C}}$

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