My notes a container is divided into two equal compartments by a partition. one compartment is initially filled with helium at a temperature of 240 k; the other is filled with nitrogen at a temperature of 315 k. both gases are at the same pressure. if we remove the partition and allow the gases to mix, what will be their final temperature?

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.