Question

Nistu is cooking rice in a pot. When she leaves the pot on the stove for a while, the temperature of the rice increases. What happens to the molecules of the rice when the temperature of the rice increases?

Answer 1

Answer:

The energy of the molecules in the rice increases.

Explanation:

Answer 2

Answer:

Their average kinetic energy increases

Explanation:

The average kinetic energy of the rice molecules increases as the pot is left on the cooking stove.

Heat is transferred to the pot by conduction from the heat source. The heat is then transferred to the rice in the cooking pot by convection.

• As the water in the pot heats up.
• The rice gains thermal energy.
• This causes the molecules of the rice particles to start vibrating.
• As the molecules vibrate about their fixed position, their thermal energy continues to increase.
• Therefore, the amount of heat absorbed by the rice increases with time and this actually cooks the food.