#### Closed system. Entropy

Two kilogram of Freon-12, initially at 0.15 MPa and 60^{o}C, are
compressed to saturated vapor in isothermal fashion.

The heat-transfer from the Freon-12 to the surrounding is reported to be
100 kJ. Can this value be correct ? State the reason for your answer.

HINT : use the fact that the actual change of entropy must be
"blank" than ∫ dQ/T at best equal.

Use the table below to determine the answer.

**Superheated Freon-12**

T [^{o}C] |
p [MPa] |
v [m^{3}/kg] |
h [kJ/kg] |
s [kJ/(kg K)] |

60 | 0.15 | 0.149 | 228.3 | 0.8787 |

**Saturated Freon-12-vapor**

T [^{o}C] |
p [MPa] |
v [m^{3}/kg] |
h [kJ/kg] |
s [kJ/(kg K)] |

60 | 1.53 | 0.011 | 209.1 | 0.6760 |