Triple Point

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Zhiyong Xie 3K
Posts: 10
Joined: Wed Sep 21, 2016 2:55 pm

Triple Point

Postby Zhiyong Xie 3K » Sat Jan 14, 2017 10:40 pm

I understand that during a phase change in water, two phases may exist at the same time. I heard that there is something called a triple point, in which all three phases of water could co-exist at the same time but I can't seem to wrap my head around it. Please explain!

Posts: 11
Joined: Sat Jul 09, 2016 3:00 am

Re: Triple Point

Postby Stephanie_Younan_3D » Sat Jan 14, 2017 11:09 pm

So the triple point is at around 0.01 degrees Celsius and 611.657 Pascals and this is the lowest pressure at which liquid water can exist. At this temperature and pressure, all three phases coexist in thermodynamic equilibrium. Any slight change in pressure can make the water change its state.

Morgan Zapasnik 1N
Posts: 16
Joined: Fri Jul 22, 2016 3:00 am

Re: Triple Point

Postby Morgan Zapasnik 1N » Sun Jan 15, 2017 8:43 pm

As a follow-up question, can the triple point occur for other molecules?

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Joined: Wed Sep 21, 2016 2:57 pm

Re: Triple Point

Postby Camille_2G » Sun Jan 15, 2017 8:51 pm

Yes, the triple point occurs for other molecules such as cyclohexane.

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