If 700 Joules of heat is added to a system, while the system does 550 Joules, by how much does the internal energy increase?
A) -1250 J
B) -150 J
C) 700 J
D) 150 J
E) 1250 J

Question

Quizplus · Accepted Answer

The increase in internal energy can be calculated using the first law of thermodynamics, which states that the change in internal energy (ΔU) is equal to the heat added to the system (Q) minus the work done by the system (W). Therefore, ΔU = Q - W = 700 J - 550 J = 150 J.

If 700 Joules of Heat Is Added to a System