How much heat energy is transferred to or from the gas

  • Thread starter Meteo
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0.250 mol of a monatomic gas follows the process shown in the figure.
attachment.php?attachmentid=5591&stc=1&d=1132268995.jpg


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

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

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

I am not sure how to relate pressure and volume to heat energy.

I have [tex]pV=nRT[/tex] and [tex]\Delta E_{th}=W+Q[/tex]

Also for the third question. would I just subtract the energy at point 3 from the energy at
point 1?
 

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Andrew Mason
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Meteo said:
0.250 mol of a monatomic gas follows the process shown in the figure.
attachment.php?attachmentid=5591&stc=1&d=1132268995.jpg

How much heat energy is transferred to or from the gas during process 1 to 2?
How much heat energy is transferred to or from the gas during process 2 to 3?
What is the total change in thermal energy of the gas?
I am not sure how to relate pressure and volume to heat energy.
I have [tex]pV=nRT[/tex] and [tex]\DeltaE_th=W+Q[/tex]
Also for the third question. would I just subtract the energy at point 3 from the energy at point 1?

The change in internal (thermal) energy of the gas is:

[tex]\Delta U = nC_v\Delta T = \Delta Q + W[/tex] where W is the work done to the gas (use -W if W is the work done by the gas).

What is [itex]C_v[/itex] for an ideal monatomic gas?

AM
 

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