Question

Hot coffee in a mug cools over time and the mug warms up. Which describes the energy in this system?

Answer 1

Answer:  option 3

The heat energy from the coffee is transferred to the mug. This is because of entropy change. For a certain time period the coffee release the heat to the adjacent walls of the mug. But after certain period of time both the mug and coffee reaches to the same temperature i.e., they become under equilibrium state.

And also over the time period the heat may also transfers to the surroundings and the mug will cool down and matches to the surrounding temperature.

Answer 2

Answer: Thermal energy from the coffee is transferred to the mug.

Explanation:

Heat loss will occur due to convection radiation and conduction

The mug gains heat from the coffee by conduction