A system contains 500 J of energy. 150 J is lost as heat to surroundings. What is the remaining energy and where did the energy go?

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Multiple Choice

A system contains 500 J of energy. 150 J is lost as heat to surroundings. What is the remaining energy and where did the energy go?

Energy conservation and transfer: when energy leaves a system as heat, the energy inside the system decreases by that amount. Here, 150 J leaves as heat to the surroundings, so the remaining energy in the system is 500 J minus 150 J, which equals 350 J. The 150 J that left is now in the surroundings as thermal energy, not stored or converted inside the system. So the remaining energy is 350 J, and the energy went to the surroundings as heat.

Energy conservation and transfer: when energy leaves a system as heat, the energy inside the system decreases by that amount. Here, 150 J leaves as heat to the surroundings, so the remaining energy in the system is 500 J minus 150 J, which equals 350 J. The 150 J that left is now in the surroundings as thermal energy, not stored or converted inside the system. So the remaining energy is 350 J, and the energy went to the surroundings as heat.

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