Question

Assume the cup of tea has cooled off faster than the pot of tea. In which liquid would the molecules be moving faster and in which would they be moving slower?

Answer 1

In the pot of tea the molecules would be moving faster than the tea in the cup.

So when the liquid heats up the molecules vibrate fast and it increases the difference between them. When the heat leaves a substance, the molecules vibrate slower and get closer.

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Answer 2

In the pot of tea the molecules would be moving faster than in the cooled cup of tea. As liquid is heated the atoms vibrate faster which increases the distance between them. When heat leaves a substance, the molecules vibrate slower and get closer.