- #1
chriswilson
- 3
- 0
Homework Statement
Assume ideal gas conditions. Cp=(7/2)R, Cv=(5/2)R
15 moles of airis contained in a cylinder and prevented from escaping by a frictionless piston
initial conditions are 1.5 bar, gas volume 0.2m^3
final conditions required are 10 bar t 27 degrees celsius
calculate the internal energy change and associated heat, Q, and work W, for
i) constant pressure process, followed by constant volume process
ii) constant volume process followed by constant pressure process
Homework Equations
the ideal gas law pV=nRT i assume can be used to find the temperature at the initial temperature.
The Attempt at a Solution
once I've found deltaU i think I could work out the heat and work but I really don't know how to get started. my textbook gives equations of
deltaU= integral(CvdT) however I'm not really sure how to use this.
sorry if its not too clear I hope you can understand it.