GATE XE (Engineering Sciences) 2018 - Question 75

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Section: Thermodynamics | Marks: 2

Consider the following statements for an ideal gas undergoing a reversible non-flow process: P. If the process is adiabatic, the change in enthalpy of the gas is necessarily zero. Q. If the process is adiabatic, the change in entropy of the gas is necessarily zero. R. If the process is isothermal, the change in enthalpy of the gas is necessarily zero. S. If the process is isothermal, the change in entropy of the gas is necessarily zero. Which one of the following options is valid?

  • A. Only P is correct
  • B. Only S is correct
  • C. Only Q and R are correct
  • D. Only P and S are correct

Answer: C. Only Q and R are correct

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