Understanding the Heating Process of Water

What happens to the kinetic energy of water molecules as ice is heated?

• It remains constant.

• It decreases.

• It increases.

• It fluctuates randomly.

At what temperature does water boil, and what happens to the temperature during this process?

• 100°C, and the temperature remains constant.

• 0°C, and the temperature remains constant.

• 100°C, and the temperature increases.

• 0°C, and the temperature decreases.

What is the primary use of heat energy during the boiling of water?

• To form new hydrogen bonds.

• To increase the temperature of water.

• To break hydrogen bonds.

• To decrease the kinetic energy of molecules.

What does the flat line on the heating curve of water indicate?

• A decrease in temperature.

• A constant temperature during a state change.

• An increase in temperature.

• A random fluctuation in temperature.

Why is more heat required to boil water into steam compared to melting ice into water?

• Because more hydrogen bonds need to be broken.

• Because water molecules are heavier than ice molecules.

• Because the temperature of steam is lower than that of water.

• Because steam is denser than water.