Draw the ABCD cycle on a P-V diagram and determine all of the unknown temperatures, pressures, volumes at points A, B, C, D in terms of n, R, Pa, Va. What is the net mechanical work done by the gas over the entire cycle? How much heat is absorbed by the gas during each leg of the cycle? Explain why this is the cycle of a heat engine, and determine it's efficiency.
Draw the ABCD cycle on a P-V diagram and determine all of the unknown temperatures, pressures, volumes at points A, B, C, D in terms of n, R, Pa, Va. What is the net mechanical work done by the gas over the entire cycle? How much heat is absorbed by the gas during each leg of the cycle? Explain why this is the cycle of a heat engine, and determine it's efficiency.
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A -> B isovolumetric transformation from pressure Pa and Volume Va to pressure Pb = 2 Pa
B ->C: Isobaric expansion from volume Va to volume Vb = 3 Va
C -> D: isovolumetric transformatio down to pressure Pd = Pa
D -> A: isobaric compression
Transcribed Image Text:An ideal gas is taken through these
thermodynamic cycles
Draw the ABCD cycle on a P-V diagram and
determine all of the unknown temperatures,
pressures, volumes at points A, B, C, D in terms of n,
R, Pa, Va.
What is the net mechanical work done by the gas
over the entire cycle?
How much heat is absorbed by the gas during each
leg of the cycle?
Explain why this is the cycle of a heat engine, and
determine it's efficiency.
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