Question

A sample of water is being heated over a flame. What happens to the water as it is heated? (2 points)

The velocity of the water molecules begins to decrease.
The volume of the water decreases.
The water undergoes an endothermic reaction.
The kinetic energy of the water molecules increases.

Answer 1

The answer is D, the kinetic energy of the water molecules begins to increase. When you heat up a pot of water, the water molecules begin to move very fast. Thus, stating that the kinetic energy of water molecules increase since the water molecules go from moving a little bit to moving really fast! I hope this could help!

Answer 2

Answer: The kinetic energy of the water molecules increases.

Explanation: When a sample of water is being heated over the flame, the kinetic energy of the molecules of the water increases.

As we know that, according to the kinetic theory of molecular gases, temperature is directly proportional to the velocity of the molecule.

Thus, when the water sample in the container is heated, the particles present at the bottom will see an increment in their velocity thus they will move upward and will try to escape the conatiner in the form of the vapors.