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Butane gas at 50C and 7 atm gauge pressure enters a horizontal 5-in Schedule 40. The flow rate of the entering gas is 1000 m/hr. (a) Assuming isothermal flow, calculate (a.1) the pressure at the discharge end of the pipe and the heat transfer rate for a pipe length of 100 m. (b) If the flow is adiabatic, calculate the (b.1) maximum possible length of the pipe (1.2) pressure and stagnation temperature of the gas at the end of the pipe at maximum length