Question

In a reactor two stream are entering, one with S at 10 atm and 27^oC, and another with O2 at 10 atm and 0^oC, producing SO2, SO3, and O2 at 10 atm and 23^oC, what are the total degrees of freedom?

(a) 10

(b) 13

(c) 15

(d) 17

The question was posed to me in an international level competition.

I would like to ask this question from Degrees of Freedom Analysis in portion Energy Balances that Include the Effects of Chemical Reaction, Ideal Processes, Efficiency and the Mechanical Energy Balance and Heats of Solution and Mixing of Basic Chemical Engineering

Answer 1

The correct choice is (d) 17

Best explanation: Total species = 1 + 1 + 3 = 5, total stream flows = 3, stream pressures = 3, stream temperatures = 3, heat released = 1, and extent of reaction = 2, => degrees of freedom = 5 + 3 + 3 + 3 + 1 + 2 = 17.