Agas at pressure p=700kpa and temp t1=510°c flows with velocity w1=30m/s into vertical pipe of inlet and exit diameter d1=100mm and d2=120mm respectively. the gas leaves the pipe having p2=530kpa and t2=300°c at the height delta(triangle) z =30m above its inlet. determine magnitude and direction of heat exchange between the gas and the surrounding. the specific heat at constant pressure for the gas is cp=1.34kj/kg and its specific enthalpy is given by following formula h=cpt . the gas density can be found from an ideal gas relationship pv=mrt assuming that individual gas constant is r=223.5j/kg/k.