Enthalpy

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Vanessa Rojas 4F
Posts: 15
Joined: Wed Feb 20, 2019 12:17 am

Enthalpy

Postby Vanessa Rojas 4F » Sat Jan 25, 2020 5:52 pm

Why do vapors have higher enthalpies than liquids?

Bryce Barbee
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am

Re: Enthalpy

Postby Bryce Barbee » Sat Jan 25, 2020 6:11 pm

Vapors have a higher enthalpy than liquids because once the temperature of the system, in a water model, hits 100 degrees celsius there is more heat that is required to change the water from a liquid state to a gaseous state. This is compared to when water is at a solid ice state and needs less heat to change it into liquid water state.

Anika Chakrabarti 1A
Posts: 102
Joined: Sat Aug 24, 2019 12:17 am

Re: Enthalpy

Postby Anika Chakrabarti 1A » Sat Jan 25, 2020 7:31 pm

In the heating curve graph that Lavelle showed in class, the amount of energy needed for melting is much lower than the energy required for vaporization. This means that heat is absorbed in order to go from a liquid to a vapor, so the vapor would have a higher enthalpy.


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