Difference in energy needed for the different phases

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Diana Chavez-Carrillo 2L
Posts: 122
Joined: Fri Sep 28, 2018 12:18 am

Difference in energy needed for the different phases

Postby Diana Chavez-Carrillo 2L » Sat Feb 08, 2020 11:18 pm

Why does it take more energy to vaporize (liquid to gas) than to melt/fusion (solid to liquid)? Does it have to do with their intermolecular forces?

Jacey Yang 1F
Posts: 101
Joined: Fri Aug 09, 2019 12:17 am

Re: Difference in energy needed for the different phases

Postby Jacey Yang 1F » Sat Feb 08, 2020 11:30 pm

It requires much more energy to completely break the hydrogen bonding in water molecules to convert to the gas phase.

Adam Kramer 1A
Posts: 103
Joined: Sat Aug 24, 2019 12:15 am

Re: Difference in energy needed for the different phases

Postby Adam Kramer 1A » Sat Feb 08, 2020 11:33 pm

Yes, it requires much more energy to completely separate the molecules (vaporizing) than to just separate slightly, as with melting a substance. The molecules are much further apart, so there must be more energy to separate these molecules greater than the energy to melt the solid.

CalvinTNguyen2D
Posts: 102
Joined: Thu Jul 25, 2019 12:16 am

Re: Difference in energy needed for the different phases

Postby CalvinTNguyen2D » Sun Feb 09, 2020 4:34 pm

Vaporization requires significantly more energy to completely break the hydrogen bonds between the H2O molecules, rather than just slightly mobilising the water molecules by melting it from solid to liquid.


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