Question #a0bdb

1 Answer
Mar 7, 2017

I would say that the water is warm.


The movement of the particles should reflect the internal energy of the water that in turn can be seen "macroscopically" as how hot is the water (and we measure this by measuring the temperature of the water).
Molecules moving around in a hot substance

Obviously you should refer to a reference point but I would say that the water is at high temperature compared, for example, to water where the molecules move less rapidly.
A way to see this is to say that you heat the water (with a fire) so you give energy to it (internal energy); the molecules receive the energy and start to move more rapidly (and eventually escape from the liquid) and this increase in energy is observed when you put a thermometer into the water (the mercury takes a bit of this internal energy, expands and you read an increase in temperature!).

Hope I didn't confuse you even more!