Understanding the Concepts

* Heat Loss: When a substance cools, it releases heat energy to its surroundings.

* Change in Energy: The change in energy is the amount of heat lost or gained by the substance. Since the water is losing heat, the change in energy will be negative.

Calculation

The change in energy is equal to the amount of heat lost. Therefore, the change in energy is -3140 J.

Explanation

The problem states that the water loses approximately 3140 J of heat. Since the water is losing heat, the change in energy is negative.