Thermodynamics Interactive Example
A monatomic, ideal gas is in a sealed container (the number of gas molecules is always constant:
n = 2 moles); the initial pressure is Pi = 1.01 x 105 Pa and the initial volume is
Vi = 0.0224 m3.
- First, the volume of the gas is decreased at a constant
pressure (at Pi = 1.01 x 105 Pa) to a final volume of
Vf = 0.0155 m3.
- Second, the pressure of the gas is increased at a constant
volume (at Vf = 0.0155 m3) to a final pressure of
Pf = 1.35 x 105 Pa.
How much heat was added to (give as a
positive number) or removed from (give as a negative number) the system? (The gas constant R = 8.31 J/mole-K.)
Q = J