An ideal monatomic gas made up of N atoms is held in a container with a movable piston. In a reversible isothermal, that is at constant temperature T, expansion of the gas from a volume of V. to V: (Vi > V.), a) What is the change in the (internal) energy of the gas? Is it positive or negative? b) How much work does the gas do? Is it positive or negative? c) How much heat has been transferred to the gas? Is it positive or negative? Has heat been transferred into or out of the gas? d) Show that the 1 law of thermodynamics is satisfied.

An ideal monatomic gas made up of N atoms is held in a container with a movable piston. In a reversible isothermal, that is at constant temperature T, expansion of the gas from a volume of V. to V: (Vi > V.), a) What is the change in the (internal) energy of the gas? Is it positive or negative? b) How much work does the gas do? Is it positive or negative? c) How much heat has been transferred to the gas? Is it positive or negative? Has heat been transferred into or out of the gas? d) Show that the 1 law of thermodynamics is satisfied.