The following is true of the system (versus control volume) form of the basic equations (mass, momentum, angular momentum, energy, and entropy):

The equations apply to a fixed quantity of mass.
The equations are formulated in terms of extensive properties.
The equations apply to a fixed volume.

10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.