### Formula

DeltaS

the entropy change

n

the number of moles of gas

Cp

the specific heat at constant pressure

T

the final temperature

T0

the initial temperature

P

the final pressure

P0

the initial pressure

R

gas constant (8.3145)

DeltaS

the entropy change

n

the number of moles of gas

Cp

the specific heat at constant pressure

T

the final temperature

T0

the initial temperature

P

the final pressure

P0

the initial pressure

R

gas constant (8.3145)

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. For some other transformations, not all of these properties (specific heat, volume, pressure or temperature) are constant. In these cases, for only 1 mole of an ideal gas, the change in entropy can be given by the formula.

n

Cp

T

T0

P

P0

R

DeltaS

Precision

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