Water is being Pumped from Point $1,$ Which is $10$ ft above a ground throngh a pipe of $11cm$ dimeter at rate of $100ga\frac{l}{m}in$ using pump of $1$ hs power the water passes through a heat exchanger wich removes neat from the water at rate $10,000$ Btu$/$hv$.$ the water leave the $h$ eat Exchanger passes through apipe of $0\mathrm{.}5f{t}^2$ cross $-$ Section area, veaching the wator to point $(2)$ which is $85ft$ above the ground. Caleulate the change in Enthalpy per Ibm? AH