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What is the accumulation in the system after 4 second if the out flow and in flow rates are 3 g/s and 8 g/s?

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What is the accumulation in the system after 4 second if the out flow and in flow rates are 3 g/s and 8 g/s?

(a) 12 g

(b) 20 g

(c) 32 g

(d) 40 g

The question was asked in unit test.

This interesting question is from Open and Closed Systems in division Introduction to Material Balances of Basic Chemical Engineering

1 Answer

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Best answer
Correct choice is (b) 20 g

Explanation: Accumulation = 4*(8 – 3) = 20 g.

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