Two isothermal plates suspended vertically in 20°c atmospheric air form a channel 8 cm wide. the channel height and depth are 40 cm and 1 m, respectively. if the surface temperature is 175°c, find the convection heat transfer in the channel.

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.