Two hydrocarbons, J and K, are present in vapours entering a fractionating column below the middle outlet.
The middle and upper outlets collect liquids that condense in the section immediately below each outlet.
| Hydrocarbon | Boiling point in ∘C^\circ\text{C}∘C |
|---|---|
| J | 185 |
| K | 100 |
A cooling fault changes the temperatures at the outlets.
| Outlet | Temperature during normal operation in ∘C^\circ\text{C}∘C | Temperature during the cooling fault in ∘C^\circ\text{C}∘C |
|---|---|---|
| Middle | 170 | 200 |
| Upper | 80 | 110 |
Explain how the outlet at which each hydrocarbon is collected changes during the cooling fault.