Heat is transfer to a closed system at a rate of 2 kw for 1 hour during the same time interval, the system does work on the outside equal to 4.0 mj. the increase in energy in kj of the system is equal to? ?

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.