Why doesn't (P1xV1)/T1 = (P2xV2)/T2 work here?

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SUMMARY

The discussion centers on the thermodynamic behavior of R-134a in a rigid container. The initial conditions include 10 kg of R-134a at -40 degrees Celsius and a volume of 1.348 m³, leading to a calculated final temperature of 66.3 degrees Celsius and an initial pressure of 51.25 kPa. The equation (P1 x V1)/T1 = (P2 x V2)/T2 fails to hold true due to the non-ideal gas behavior of R-134a at the specified temperature range, indicating that it does not behave as an ideal gas under these conditions.

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This discussion is beneficial for mechanical engineers, HVAC professionals, and students studying thermodynamics, particularly those working with refrigerants like R-134a.

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10 kg of R-134a fill a 1.348 m^3 rigid container at an initial temperature of -40 degrees Celsius. The container is then heated until the pressure is 200 kPa. Determine the final temperature and the initial pressure.

I found the final temperature to be 66.3 degrees Celsius and the initial pressure to be 51.25 kPa using thermodynamic property tables. However, when I plugged all of the values into the equation (P1 x V1)/T1 = (P2xV2)/T2, it does not work. Can anyone explain why?
 
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Would you expect it to behave as an ideal gas over that temperature range?
 
ahh. i see. thanks =)
 

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