版权所有：华东理工大学物理化学教研室 8 Consider a perfect gas inside a cylinder fitted with a piston. Let the initial state be T, Vi and the final state be T, Vf . The change of state can be brought about in many ways, of which the two simplest are following: Path 1, in which there is free expansion against zero external pressure; Path 2, in which there is reversible, isothermal expansion. Calculate w , q , and Δ U f o r e a c h process. Example -Calculating work, heat, and internal energy版权所有：华东理工大学物理化学教研室 8 Consider a perfect gas inside a cylinder fitted with a piston. Let the initial state be T, Vi and the final state be T, Vf . The change of state can be brought about in many ways, of which the two simplest are following: Path 1, in which there is free expansion against zero external pressure; Path 2, in which there is reversible, isothermal expansion. Calculate w , q , and Δ U f o r e a c h process. Example -Calculating work, heat, and internal energy