One mole of an ideal monoatomic gas goes around the cycle 1-2-3-1: 1 to 2 at constant volume from 300 K to 500 K, 2 to 3 adiabatic down to the pressure of state 1, and 3 to 1 at constant pressure. Whi

Question

One mole of an ideal monoatomic gas goes around the cycle 1-2-3-1: 1 to 2 at constant volume from 300 K to 500 K, 2 to 3 adiabatic down to the pressure of state 1, and 3 to 1 at constant pressure. Which statements are correct?

TestHub · Accepted Answer

P 2 ​ P 3 ​ ​ = 500 300 ​ = 0.6 and T 3 ​ = T 2 ​ ( 0.6 ) 0.4 = 407.6 K. 1-2: Q = 2 3 ​ R ( 200 ) = 2494 J. 2-3: W = 2 3 ​ R ( 500 − 407.6 ) = 1152 J. 3-1: W = R ( 300 − 407.6 ) = − 895 J. Net work = 258 J, so D is wrong.

Physics - Heat & Thermo Question with Solution | TestHub

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