Question

Divers found two substances on the bottom of the ocean. At room temperature, both substances are liquid. Scientists then transferred the same amount of energy out of both substances. When a scientist checked again, Substance 1 had changed phase, but Substance 2 had not. How are Substances 1 and 2 different?

Answer 1

Answer:

Substance 1 has a weaker attraction between its molecules than Substance 2. Its molecules now move around each other.

Explanation:

The molecules of substances are held together by intermolecular bond forces.

 

The strength of these intermolecular bond forces determine the melting and boiling points of a substance.

 

If the magnitude of intermolecular bonding forces of substance is significant, the boiling point and melting point of the substance will be high.

 

Given the the two substances; 1 and 2, the substance having the weakest intermolecular bond forces will change phase first even though an equal amount of energy was supplied to the two substances. When it changes phase, its molecules are now free to move around each other.

 

Since substance 1 changes phase first, it has a weaker attraction between its molecules than Substance 2. Its molecules now move around each other.

Answer 2

Answer:

Substance 2 is a still figure and substance 1 isn't

Explanation: