Question

Given the following information about a system, calculate specific enthalpy (in Btu/lbm).

(a) 629.6 btu/lbm

(b) 639.6 btu/lbm

(c) 660.9 btu/lbm

(d) 640.9 btu/lbm

Answer 1

Correct choice is (a) 629.6 btu/lbm

Easiest explanation: h = u + Pv

h = (600 frac{Btu}{lbm} + (100 frac{lbf}{in^2}) (1.6 frac{ft^3}{lbm}) (144 frac{in^2}{ft^2}) (frac{Btu}{778 ,ft-lbf})) = 629.6 btu/lbm.