Phase changes: endothermic vs exothermic
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Phase changes: endothermic vs exothermic
Would the reverse reactions of vaporization, melting, and sublimation be exothermic?
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Re: Phase changes: endothermic vs exothermic
Yes, the reverse reactions (condensation, freezing, and deposition) would be exothermic because they release energy, forming a more stable phase of matter.
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Re: Phase changes: endothermic vs exothermic
Bond formation is typically exothermic (condensation, freezing, deposition), and bond breaking is typically endothermic (melting, vaporizing, sublimation).
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Re: Phase changes: endothermic vs exothermic
Yes, the opposite of these process is condensation, freezing, and deposition respectively, which are all exothermic.
Re: Phase changes: endothermic vs exothermic
The energy change in the reverse reaction will always be the opposite of the forward reaction since the heat curve is flipped. So the reverse reaction for something endothermic such as vaporization would be exothermic
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Re: Phase changes: endothermic vs exothermic
Why would the reverse reaction of vaporization, melting and sublimation be exothermic?
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Re: Phase changes: endothermic vs exothermic
yes the reverse reaction, condensation, solidification, and deposition are all exothermic where they expel heat energy going from higher energy phases to lower energy phases.
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Re: Phase changes: endothermic vs exothermic
Yes, it is important to note that the reverse of those reactions are condensation, freezing, and deposition, respectively. Condensation, freezing, and deposition are bond forming, which is why they would be exothermic. Bond breaking, on the other hand, would include vaporization, melting, and sublimation. These would be endothermic.
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Re: Phase changes: endothermic vs exothermic
Natalie Benitez 1E wrote:Why would the reverse reaction of vaporization, melting and sublimation be exothermic?
Well first, the reason why vaporization, melting, and sublimation are endothermic is because bonds are being broken, which takes energy to happen. So in the reverse reaction, bonds are being formed, and it is exothermic because forming bonds releases energy.
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Re: Phase changes: endothermic vs exothermic
yes, the reverse of endothermic reactions are exothermic and vice versa
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Re: Phase changes: endothermic vs exothermic
So essentially: endo is adding energy/heat, and exo is when heat/energy is released
Re: Phase changes: endothermic vs exothermic
Yes! Reverse rxns are exothermic!
Exothermic: condensation, freezing, deposition
Endothermic: vaporization, melting, sublimation
Exothermic: condensation, freezing, deposition
Endothermic: vaporization, melting, sublimation
Re: Phase changes: endothermic vs exothermic
Reverse reactions are exothermic because heat is not required, in fact heat is released when going in the reverse reaction.
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