Chemical Engineering Thermodynamics (MCQs)

Helmholtz free energy (A) is defined as

  • A. A = H – TS
  • B. A = E – TS
  • C. A = H + TS
  • D. None of these
Answer: Option B.

Helmholtz free energy :



So, the decrease in Helmholtz energy denotes maximum work done in an reversible process under isothermal conditions.

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