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3.saturated r-134a vapor enters a compressor at 6 f. at compressor exit, the specific entropy is the same as that at the inlet, and the pressure is 80 psia. determine the r-134a exit temperature and the change in the enthalpy of the r-134a.

Sagot :

Engineers employ the particular entropy rather than the general entropy in thermodynamic analysis. A substance's specific entropy (s) is its entropy per unit mass.

It is calculated by dividing the entire mass by the total entropy (S) (m). Entropy measures a substance's energy that is no longer used for productive labor. The amount of thermal energy in a system that cannot be used for work, expressed as entropy, varies with temperature. It requires a specific amount of energy to heat a molecule, let's say a gas molecule, before its temperature can increase. The molecule's specific heat is defined as its energy per unit mass.

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