In a closed system, if the internal energy increases, what can be said about the

In a closed system, if the internal energy increases, what can be said about the work done and heat added? (2020)

In a closed system, if the internal energy increases, what can be said about the work done and heat added? (2020)

Step 1: Understand that a closed system means no matter can enter or leave the system, but energy can be exchanged.
Step 2: Know that internal energy is the total energy contained within the system.
Step 3: Recall 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).
Step 4: If the internal energy increases (ΔU > 0), it means that the sum of heat added to the system and work done on the system is greater than the work done by the system.
Step 5: Conclude that either heat is added to the system (Q > 0) or work is done on the system (W < 0), or both.

No concepts available.