Specific heats relating to ideal gas properties?

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SUMMARY

The discussion focuses on calculating specific heats for air and carbon dioxide (CO_2) in a rigid, insulated container with no heat transfer to the environment. The initial conditions include 1 kg of air at 500 kPa and 350 K, and 3 kg of CO_2 at 200 kPa and 450 K. The user seeks the appropriate equations or tables for specific heats, ultimately finding a relevant table in their textbook. The application of the first law of thermodynamics confirms that with Q=0 and W=0, the internal energy change is zero.

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  • Understanding of ideal gas properties
  • Familiarity with the first law of thermodynamics
  • Knowledge of specific heat capacities for gases
  • Ability to interpret thermodynamic tables
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  • Research specific heat capacities for air and CO_2 at varying temperatures
  • Learn how to apply the first law of thermodynamics in closed systems
  • Explore thermodynamic tables for various gases
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dillonmhudson
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Partition separates two gases in a rigid well-insulated container. Q=0, W=0.

State 1:

Air:
m=1kg
P=500kPa
T=350K

CO_2:
m=3kg
P=200kPa
T=450K

Assume constant specific heats. Assume kinetic and potential energy changes are negligible. Assume the partition between the two gases can transfer heat between each other and the partition cannot hold any energy itself. Assume both behave as ideal gases.

My question is what equation/table do I use to find out what the specific heats of air and CO_2 actually are?

I appreciate any help.

EDIT: Find the final temp using the first law:
Q-W=m(u2-u1)
Q=0
W=0
U2-U1=0
 
Last edited:
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Nevermind. There's a table in my book I can use.
 

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