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Thermodynamics: Work done, heat transfer and internal energy

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0.110 moles of a mono atomic gas follows the process shown in the figure

Part A
How much heat energy is transferred to or from the gas during process 1 to 2?

Part B
How much heat energy is transferred to or from the gas during process 2 to 3?

Part C
What is the total change in thermal energy of the gas?

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Solution Summary

The thermodynamic process is shown on a Pressure-Volume diagram, the heat transfered and the change in internal energy is calculated.

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I can't figure this problem out. Below are some numbers that I have tired but were not right. I have an example of the same sort of problem except it has .190 moles. The answers to a was 810 J, and the answer to b was -486 J, part c has not been figured out yet. I know that it has something to do with the PV=nrt, and p has to equal to ka, not atm.
Problem 17.61
0.110 of a monatomic gas follows the process shown in the figure
.

Part A
How much heat energy is transferred to ...

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