Question

A scientist has two substances that she is testing in her lab: a pink substance and a green substance. At room temperature, both substances are liquids. The scientist transferred the same amount of energy into both substances. She finds only the pink substance changed phase. How is the pink substance different from the green substance?
The pink substance has a . . .

Answer 1

Answer:

The pink substance changed phase because its molecules had weak forces of attraction as compared to the green molecules. The molecules of the pink substance moved fast enough so that they could change phase. The molecules of the green substance had greater forces of attraction between them due to which the energy given to them was not enough to break them and change their phase.