Study the scenario.

Question

A match is lit in an isolated system. The match releases 40 J of heat energy. Which choice correctly describes what happens to the total energy of the system over time?

The total energy of the isolated system eventually becomes zero once the match goes out.
The total energy of the isolated system decreases because the heat from the match dissipates into the air.
The total energy of the system remains at a constant 40 J of energy because energy is conserved in an isolated system.
The total energy of the isolated system increases because the heat warms up the surrounding air.

Answer 1

Constant 40J. No energy or mass can be transferred in an isolated system.

Answer 2

Thank you!