phase change heat supplied

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ursulavictorino1K
Posts: 55
Joined: Sun Feb 17, 2019 12:15 am

phase change heat supplied

Postby ursulavictorino1K » Thu Jan 30, 2020 9:43 pm

Why does the heat supplied for phase changes between each state vary so much? Why does it take more heat to change from liquid to gas than any other phase change?

Justin Seok 2A
Posts: 104
Joined: Sat Aug 24, 2019 12:15 am

Re: phase change heat supplied

Postby Justin Seok 2A » Thu Jan 30, 2020 9:49 pm

Essentially, when a liquid turns to gas, the bonds between atoms must be broken in order to become gas, which would presumably take a lot more heat than turning solids to liquid, which don't completely break the bonds but make them weaker.

LBacker_2E
Posts: 104
Joined: Wed Sep 18, 2019 12:21 am
Been upvoted: 1 time

Re: phase change heat supplied

Postby LBacker_2E » Fri Jan 31, 2020 1:55 am

Don't forget to add the enthalpy of any state changes when you are calculating the enthalpy for a reaction. This phase change from liquid to gas is crucial in determining how much energy will be left or used after the reaction.

Matthew Chan 1B
Posts: 111
Joined: Sat Sep 07, 2019 12:16 am

Re: phase change heat supplied

Postby Matthew Chan 1B » Sun Feb 02, 2020 3:42 pm

Transitioning from a liquid to a gas requires the breaking of bonds, which is why so much more energy is needed to make this change in comparison to the transition from solid to liquid.


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