Using Hess' Law
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Cory Poon 3G
- Posts: 101
- Joined: Fri Sep 24, 2021 5:01 am
Using Hess' Law
In the Achieve Week 4, #5, it askes to find delta H. When we flip the equations, why do the numbers change signs?
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Sharlene Duong 3E
- Posts: 101
- Joined: Fri Sep 24, 2021 7:07 am
Re: Using Hess' Law
When you flip the equation, the numbers change signs because the forward reaction will either be endothermic (+deltaH) or exothermic (-deltaH). The reverse reaction (or the equation when it gets flipped) will be the opposite of the forward reaction, so the sign must change to show that the equation is now exothermic or endothermic. Hope this helps!
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