Considering Constant-Composition Processes An equimolar mixture of N2 and CO2 ent...

Considering Constant-Composition Processes

An equimolar mixture of N₂ and CO₂ enters a heat exchanger at -40°F, 500 lbf/in.² and exits at 500°F, 500 lbf/ in.² The heat exchanger operates at steady state, and kinetic and potential energy effects are negligible.

(a) Using the ideal gas mixture concepts of the present chapter, determine the rate of heat transfer to the mixture, in Btu per lbmol of mixture flowing.

(b) Compare with the value of the heat transfer determined using the generalized enthalpy chart (Fig. A-4), together with Kay’s rule (see Sec. 11.8).