Exergy in Chemical Reaction, Irreversibility - MCQs with Answers

Q1. How is the Helmholtz functions (F) represented?
Where U represents internal energy
T represents temperature
S represents entropy

a. F = U + TS
b. F = U – TS
c. F = UT – S
d. F = UT + S

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Q2. How is the Gibbs function (G) represented?
Where U represents internal energy
T represents temperature
S represents entropy

a. G = U + pV + TS
b. G = U – pV – TS
c. G = U + pV – TS
d. G = U – pV + TS

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Q3. What is the difference between work done by a system through an ideal reversible process and actual work done by the system called?

a. irreversibility
b. degradation
c. dissipation
d. all of the above

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Q4. Which will be a suitable condition of exergy loss and entropy generation for thermodynamically efficient process?

a. maximum exergy loss with minimum rate of entropy generation
b. minimum exergy loss with maximum rate of entropy generation
c. maximum exergy loss with maximum rate of entropy generation
d. minimum exergy loss with minimum rate of entropy generation

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