For a process at constant volume, which of the following is true? (2023)

For a process at constant volume, which of the following is true? (2023)

Step 1: Understand that 'constant volume' means the volume of the system does not change during the process.
Step 2: Recall the formula for work done (W) in a system: W = PΔV, where P is pressure and ΔV is the change in volume.
Step 3: Since the volume is constant, ΔV = 0, which means W = 0 (no work is done).
Step 4: Learn about the first law of thermodynamics, which states: ΔU = Q - W, where ΔU is the change in internal energy and Q is the heat added to the system.
Step 5: Substitute W = 0 into the first law equation: ΔU = Q - 0, which simplifies to ΔU = Q.
Step 6: Conclude that at constant volume, the heat added to the system equals the change in internal energy.

First Law of Thermodynamics – The relationship between heat added to a system, work done by the system, and the change in internal energy.
Constant Volume Process – A thermodynamic process where the volume remains unchanged, leading to no work being done.