### Formula

DeltaS

the entropy change

n

the number of moles of gas

P

the final pressure

P0

the initial pressure

R

ideal gas constant

DeltaS

the entropy change

n

the number of moles of gas

P

the final pressure

P0

the initial pressure

R

ideal gas constant

Entropy is a thermodynamic property that can be used to determine the energy available for useful work in a thermodynamic process, such as in energy conversion devices, engines, or machines. When specific heat and temperature are constant, the change in entropy is given by the formula.

n

P

P0

R

DeltaS

Precision

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