While discussing pressure gauge sets, technician a says manifold gauges are only
available in mechanical style. technician b says that when using the gauge set, make
sure both service knobs are in the open position before connecting them to a system. who is correct?

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.