A laboratory fractionating column separates a mixture containing four hydrocarbons. The table shows the boiling point of each hydrocarbon. All four hydrocarbons condense within the column.
| Hydrocarbon | Boiling point in ∘C^\circ\text{C}∘C |
|---|---|
| P | 285 |
| Q | 172 |
| R | 68 |
| S | 235 |
Which hydrocarbon travels furthest up the column before condensing?
Hydrocarbon R
Hydrocarbon S
Hydrocarbon Q
Hydrocarbon P