The scientific principle which explains the observation that the amount of heat transfer accompanying a change in one direction is numerically equal but opposite in sign to the amount of heat transfer in the opposite direction is

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This principle is known as the First Law of Thermodynamics, which is a statement of the Law of Conservation of Energy. It states that energy cannot be created or destroyed but can only be transferred or converted from one form to another. Therefore, the amount of heat transferred in one direction is equal and opposite in sign to the amount of heat transferred in the opposite direction.

The Scientific Principle Which Explains the Observation That the Amount