Question

Refer to Q7, and Express the answer in btu/lb.

(a) 0.0421 btu/lb

(b) 0.0532 btu/lb

(c) 0.0514 btu/lb

(d) 0.0432 btu/lb

I have been asked this question by my college director while I was bunking the class.

This intriguing question comes from Energy Balance Numericals Without Reactions topic in chapter Energy Balance of Bioprocess Engineering

Answer 1

Right choice is (c) 0.0514 btu/lb

For explanation: PE increase per lb = Ep / m = gh = (9.806 m/s^2) (40 m/3.2808) = 119.54 m^2/s^2 = 119.544 J/kg = (119.544 btu/1055.6)/2.2046 lb = 0.0514 btu/lb.