Phase changes: endothermic vs exothermic

[705279989]

Would the reverse reactions of vaporization, melting, and sublimation be exothermic?

[Abhi Vempati 2H]

Yes, the reverse reactions (condensation, freezing, and deposition) would be exothermic because they release energy, forming a more stable phase of matter.

[Kayli Choy 2F]

Bond formation is typically exothermic (condensation, freezing, deposition), and bond breaking is typically endothermic (melting, vaporizing, sublimation).

[Norman Dis4C]

Yes, the opposite of these process is condensation, freezing, and deposition respectively, which are all exothermic.

[Matt F]

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

[Natalie Benitez 1E]

Why would the reverse reaction of vaporization, melting and sublimation be exothermic?

[Anokhi Patel 2B]

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.

[Andres Merlos 2L]

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.

[Frank He 4G]

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.

[Kavya Immadisetty 2B]

yes, the reverse of endothermic reactions are exothermic and vice versa

[Megan Kirschner]

So essentially: endo is adding energy/heat, and exo is when heat/energy is released

[Alondra]

Yes! Reverse rxns are exothermic!

Exothermic: condensation, freezing, deposition

Endothermic: vaporization, melting, sublimation

[504939134]

Reverse reactions are exothermic because heat is not required, in fact heat is released when going in the reverse reaction.