First law of thermodynamics is a consequence of conservation of:

Question

G1 Physics · Accepted Answer

Step 1: The first law states Q = ΔU + W for a closed system with work W done by the system. Step 2: Heat and work are modes of transferring energy; neither heat nor work is itself a separately conserved quantity. Step 3: The equation expresses conservation of total energy. Final answer: (B) energy.