Air flows in a steady flow in a pipeline whose internal diameter is constant. at a particular section of the pipe the pressure, temperature and velocity are 250 psia, 700° r and 35 ft/sec, respectively. the specific volume corresponding to these conditions is 1.28 ft/lbm. at a section farther downstream the pressure is 400 psia, the velocity is 55 ft/sec and the temperature is 1700° r. a. determine the specific volume of the air at the downstream section. b. what is the magnitude and direction of the heat transfer in btu per pound?