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What Does A Negative Enthalpy Change Mean? [Solved]

If the enthalpy change of a reaction is negative, the system is losing energy, so the products have less energy than the reactants, and the products are lower on the vertical energy scale than the reactants are. Exothermic, then, implies that the system loses, or gives off, energy.

Enthalpy Change of Reaction & Formation - Thermochemistry & Calorimetry Practice Problems

This chemistry video tutorial focuses on the calculation of the

Why is there a negative sign in the change in enthalpy equation?

via YouTube Capture.

Enthalpy: Crash Course Chemistry #18

Energy is like the bestest best friend ever and yet, most of the time we take it for granted. Hank feels bad for our friend and wants …