An insulated closed piston–cylinder device initially contains 0.3 m3 of carbon dioxide at 200 kPa and 27°C. A resistance heater inside the cylinder is turned on and supplied heat to the gas. As a
result, the gas expanded by pushing the piston up, until the volume doubled. During this process,
6
the pressure changed according to = 4, in which the constant 6 has units of kPa. m
a) Find the mass of the hydrogen in the tank in kg.
b) Determine the work done by the gas in kJ.