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2 - 5 The following is one ofthe Carnot principles.The...

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Unformatted text preview: 5'. The following is one ofthe Carnot principles: .The efficiency of an Irreversible heat engine is always less than the efficiency of a reversible one operating between the sarne two reservoirs. B. The efficiency of an irreversible heat engine is ahvays less than the efficiency of a reversible one operating between any two reservoirs. E. The efficiency of an irreversible heat engine is always more than the efficiency of a reversible one operating between any two reservoirs. D. The efficiency of an irreversible heat engine is always more than the efficiency of a reversible one operating between the same two reservoirs. B. 1IlI'IIFlten none of the extensive properties of a system vary with time. the system is said to be: A. Uniform E. In equilibrium ©Steady D. All ofthe above 5. Mflsough there are many valid statements of the second law ofthennotl‘ynernlcs, film the Elect such statement from the following: a. Energy is conserved El. Entropy is conserved (C) Energy has both quantity and quality D. Entropy is zero for a pure crystalline substance at I) it 1i]. An engineer wishes to tab ulate ideal gas properties of oxygen. The properties to be Included are specific enthalpy (hi, specific volume [vi. and specific entropy [5]. Which ofthese properties can be tabulated using only temperature as the independent variable? ’2 ...
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