Question

An unsteady state system, the flow in rate of A is 10 mole/s, what is the flow out rate of B if the accumulation was 10 mole in 2 seconds?

(a) 5 mole/s

(b) 10 mole/s

(c) 15 mole/s

(d) 20 mole/s

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Query is from Steady-State and Unsteady-State Systems topic in section Introduction to Material Balances of Basic Chemical Engineering

Answer 1

Correct answer is (a) 5 mole/s

Explanation: Flow rate of B = 10 – 10/2 = 5 mole/s.