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Three feeds, 10 mole with H = 15 J/mole, 20 mole with H = 5 J/mole and F1 with 20 J/mole, if enthalpy of the products is H = 15 J/mole, what is the value of F1?

Correct Answer:
10*15 + 20*5 + F1*20 = (30 + F1)*15, => F1 = 40 mole.

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