Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN: 9780134746241
Author: Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher: PEARSON
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Question
Problem 5.8: A dry air parcel undergoes a complete Carnot cycle consisting of the steps indicated in (a)-(d). For each individual step, calculate the mechanical work w (per unit mass) done by the air par- cel and the heat q added to the parcel. alte a) Adiabatic compression from p₁ = 600 hPa and T₁ = 0°C to a temperature T2 of 25°C; .-1 Answer: w = -1.8 × 10 J kg¯ b) isothermal expansion to a pressure p3 of 700 hPa; Answer: q = 1.3 × 104 J kg-1 droms c) adiabatic expansion to a temperature T4 of 0°C; htt d) isothermal compression back to the original pressure p₁. podwangolled Also, compute e) the total work done and heat added for the complete cycle, and f) the efficiency of the cycle. Hint: You will need to keep track of the state of the parcel at the end of one step to use as the starting point for the next step. vidianer
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Transcribed Image Text:Problem 5.8: A dry air parcel undergoes a complete Carnot cycle consisting of the steps indicated in (a)-(d). For each individual step, calculate the mechanical work w (per unit mass) done by the air par- cel and the heat q added to the parcel. alte a) Adiabatic compression from p₁ = 600 hPa and T₁ = 0°C to a temperature T2 of 25°C; .-1 Answer: w = -1.8 × 10 J kg¯ b) isothermal expansion to a pressure p3 of 700 hPa; Answer: q = 1.3 × 104 J kg-1 droms c) adiabatic expansion to a temperature T4 of 0°C; htt d) isothermal compression back to the original pressure p₁. podwangolled Also, compute e) the total work done and heat added for the complete cycle, and f) the efficiency of the cycle. Hint: You will need to keep track of the state of the parcel at the end of one step to use as the starting point for the next step. vidianer
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