What is the change in internal energy of the system (ΔU)if 65 kJ of heat energy is evolved by the system and 62 kJ of work is done on the system for a certain process?

Question

Quizplus · Accepted Answer

The change in internal energy (ΔU) can be calculated using the first law of thermodynamics, ΔU = q + w, where q is the heat exchanged and w is the work done. Here, q = -65 kJ (since heat is evolved by the system, it is negative) and w = 62 kJ (work done on the system is positive). Thus, ΔU = -65 kJ + 62 kJ = -3 kJ.

What Is the Change in Internal Energy of the System