As the following figure shows, a gas passes some reverisble processes, which processes 1-2 and 4-3...

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As the following figure shows, a gas passes some reverisble processes, which processes 1-2 and 4-3 are both constant volume process, and processes 2-3 and 1-4 are both constant pressure process. Try to calculate, (1) In process 1-2-3, the gas absorbs heat 150 kcal, and does 30 kal work, if the gas passes through process 1-4-3, only 10 kcal work will be done. Then how much heat is absorb by the gas in process 1-4-3? (2) If the gas goes along process 3-1 back to state 1, the surrounding does 20 kcal work on the gas (that means the gas consume 20kcal work during process 3-1), then does the gas release or absorb heat in process 3-1, and how many kcal is it? Tips: use the energy equation of closed system; Au in the equation is the difference of internal energy of initial state and end state. 3 As the following figure shows, a gas passes some reverisble processes, which processes 1-2 and 4-3 are both constant volume process, and processes 2-3 and 1-4 are both constant pressure process. Try to calculate, (1) In process 1-2-3, the gas absorbs heat 150 kcal, and does 30 kal work, if the gas passes through process 1-4-3, only 10 kcal work will be done. Then how much heat is absorb by the gas in process 1-4-3? (2) If the gas goes along process 3-1 back to state 1, the surrounding does 20 kcal work on the gas (that means the gas consume 20kcal work during process 3-1), then does the gas release or absorb heat in process 3-1, and how many kcal is it? Tips: use the energy equation of closed system; Au in the equation is the difference of internal energy of initial state and end state. 3

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Sign convention Heat Absorbed by the g... View the full answer