Question

1. which water has more thermal energy?
2. describe the difference in the movement of the water molecules in the cold and hot water.

Explanation:

Question 5

Step 1: Recall the concept of thermal energy

Thermal energy is related to the temperature and the number of particles. Assuming the same amount (mass) of water, higher - temperature water has more thermal energy. Hot water has a higher temperature than cold water.

Question 6

Step 1: Recall the kinetic - molecular theory

According to the kinetic - molecular theory, the average kinetic energy of molecules is related to temperature.

Step 2: Compare molecular motion

Molecules in hot water have a higher average kinetic energy. So, water molecules in hot water move faster and more randomly compared to water molecules in cold water.

Answer:

1. Hot water has more thermal energy (assuming the same amount of water).
2. Water molecules in hot water move faster and more randomly than water molecules in cold water.