begin mathsize 36px style capital delta S space equals space R space ln space open parentheses V subscript 2 over V subscript 1 close parentheses space end style

ΔS = Entropy Change ; R = Universal Gas Constant ; V= Initial Velocity ; V2 = Final Velocity ; 





This online chemical calculator may be used to calculate the entropy change of an ideal gas in constant temperature. Here we have considered the entropy as the function of volume, however the entropy can be equally thought as a function of pressure since pressure and volume of a ideal gas is related inversely if the temperature remains constant.

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