How do the molecules at point a compare to the molecules at point b?

THE MOLECULES ARE CLOSER TOGETHER, THEY ARE MOVING SLOWER AND THEY HAVE LOST ENErgy

Explanation:

When water molecules are placed on a heat source then these molecules will start to gain energy. Due to this there will be movement in the molecules of water.

As a result, more heat is provided to them farther away they tend to move from each other.

So, molecules at point B are farther away from molecules at point A. This means that these molecules have gained energy due to which they are moving at a faster rate.

Thus, we can conclude that molecules at point A are compared to the molecules at point B as follows.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.