|Dec23-12, 03:41 AM||#1|
Choice of pressure when using ideal gas equation
100g of CO are contained in a weighted piston-cylinder device. Initially, the CO is at 1000kPa and 200°C. It is then heated until 500°C. Determine the final volume of the CO treating it as an ideal gas.
This is what my lecturer gave in his solution:
My question is: why is the original pressure (1000kPa) been used instead of the final pressure?
Thanks for your help.
|Dec23-12, 05:45 AM||#2|
Because initial and final pressure are equal as long as the weight on the cylinder remains the same.
|Dec23-12, 10:37 AM||#3|
You can also use Charles Law to calculate the final volume, having calculated the initial volume from the universal gas law.
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