The first law of thermodynamics is essentially a statement of:
AConservation of charge
BEntropy increase
CConservation of momentum
DConservation of energy
Answer & Solution
Correct answer: D. Conservation of energy
First law: ΔU = Q - W. The change in internal energy equals heat absorbed minus work done by the system. This is conservation of energy applied to thermodynamic systems.
Related questions
Which of the following is a reversible process in the thermodynamic sense?A refrigerator extracts 600 J from the cold compartment and rejects 800 J to the room. ItsFor an ideal gas the adiabatic equation linking pressure and volume is:A Carnot engine operates between 400 K and 300 K. If it absorbs 800 J from the hot reservoThe change in internal energy of an ideal gas (γ = 1.4) when 2 moles are heated from 300 KThe second law of thermodynamics can be stated as: no engine can convert into work:The Carnot engine's efficiency between source temperature T₁ (hot) and sink T₂ (cold) is:An ideal gas at temperature T₁ is expanded adiabatically. Its final temperature T₂ is: