# Chapter 6 - Sections 6.1-6.10 - Exercises - Review Questions: 10

If energy flows out of a chemical system and into the surroundings, the sign of $ΔE_{System}$ is negative.

#### Work Step by Step

$ΔE_{System}$ = $ΔE_{Final}$ - $ΔE_{Initial}$ = $-$$ΔE_{System}$ If a system loses energy to its surroundings, then $ΔE_{Final}$ $\lt$ $ΔE_{Initial}$ and the end change will be negative.

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