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Discussion

Match each feature of the heat generation and removal diagram with what it means.
List I
A. The S-shaped curve
B. The straight line
C. An upper intersection
D. A middle intersection
List II
1. a stable, high conversion operating point
2. heat generated by reaction against temperature
3. an unstable state that cannot be held
4. heat removed by the coolant against temperature

  • A.A-2, B-4, C-1, D-3
  • B.A-4, B-2, C-1, D-3
  • C.A-2, B-4, C-3, D-1
  • D.A-3, B-1, C-4, D-2

Answer: A

Reading the diagram tells you at once how many steady states exist and which of them the reactor will settle into. Moving the removal line by changing the coolant is what shifts the picture. The number of intersections can be one or three.

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