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An ideal gas with 3 molecules goes through a cycle as shown in the figure. Initially, the gas is at point A (1 atm and 20 cm3). Then it goes through an isochoric process to point B, an isothermal expansion to point C, an adiabatic expansion to point D, and finally an isobaric compression back to point A. (a) Determine which type of ideal gas it is, monoatomic or diatomic. Show your proof. (b) Calculate work, change of internal energy, change of heat, change of entropy for each step. (c) Calculate the efficiency of the thermal cycle.
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Question Text | An ideal gas with 3 molecules goes through a cycle as shown in the figure. Initially, the gas is at point A (1 atm and 20 cm3). Then it goes through an isochoric process to point B, an isothermal expansion to point C, an adiabatic expansion to point D, and finally an isobaric compression back to point A. (a) Determine which type of ideal gas it is, monoatomic or diatomic. Show your proof. (b) Calculate work, change of internal energy, change of heat, change of entropy for each step. (c) Calculate the efficiency of the thermal cycle.
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Topic | All topics |
Subject | Physics |
Class | Class 12 |