Question

Refer to Q8 and, calculate the rate of loss of naphthalene from the surface per unit width.

(a) 0.100 gmol/m.hr

(b) 0.102 gmol/m.hr

(c) 0.101 gmol/m.hr

(d) 0.103 gmol/m.hr

This question was posed to me by my school teacher while I was bunking the class.

The query is from Convective Mass Transfer in section Mass Transfer of Bioprocess Engineering

Answer 1

The correct answer is (c) 0.101 gmol/m.hr

To explain: Rate of loss of naphthalene = k (CAi – CA∞)

= 0.014 (1 * 10^–5 – 0) = 1.4024 * 10^–7 kmol/m^2 sec

Rate of loss per meter width = (1.4024 * 10 ^–7) (0.2) = 2.8048 * 10 ^–8 kmol/m.sec

= 0.101 gmol/m.hr.