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Unformatted text preview: 2 at the inlet as H in = 199 J/mol To determine the outlet temperature, the temperature in the EOS program was adjusted , for a pressure of 0.2 MPa (2 bar) until the enthalpy was 199 J/mol H out = 199 J/mol It took about 6 tries to get a temperature to 4 significant figures, which is more accurate then justified by the data. The exit temperature from the Cubic EOS program is 280.7 K, which is rounded to 281 K, which is equal to 8 o C. Thus expansion through a throttle valve decreased the temperature by 27 o C. Check- this makes sense, the temperature usually decreases for throttling processes. According to the SRK equation, the initial compressibility factor was 0.92, which means the gas was non-ideal initially so it would be expected to behave as a non-ideal gas. Moreover, the initial pressure was quite high (100 bar is about 1470 psia) so non-ideal behavior is expected....
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- Fall '10