In a 3 stage process Q1 = 10 J, Q2= – 15 J, Q3 = 25 J, if ∆E1 = 15J and ∆E3 = 10 J, what is the work done in second stage, if the total ∆E is 30 J?

In a 3 stage process Q1 = 10 J, Q2= – 15 J, Q3 = 25 J, if ∆E1 = 15J and ∆E3 = 10 J, what is the work done in second stage, if the total ∆E is 30 J?

(a) 5 J

(b) 10 J

(c) 15 J

(d) 20 J

This question was addressed to me in an online quiz.

My enquiry is from Energy Balances for Closed, Unsteady-State Systems in chapter Introduction to Energy Balances for Processes without Reaction and Calculation of Enthalpy Changes of Basic Chemical Engineering

In a 3 stage process Q1 = 10 J, Q2= – 15 J, Q3 = 25 J, if ∆E1 = 15J and ∆E3 = 10 J, what is the work done in second stage, if the total ∆E is 30 J?

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