A system initially has an internal energy E of 501 J. It undergoes a process during which it releases 111 J of heat energy to the surroundings, and does work of 222 J. What is the final energy of the system, in J?

Question

Quizplus · Accepted Answer

The final energy of the system can be calculated using the first law of thermodynamics: ΔE = Q - W, where ΔE is the change in internal energy, Q is the heat added to the system, and W is the work done by the system. Here, Q = -111 J (since heat is released) and W = 222 J. So, ΔE = -111 J - 222 J = -333 J. The final energy is 501 J - 333 J = 168 J.

A System Initially Has an Internal Energy E of 501