Phase Diagrams

Phase diagrams are a graph that relates the pressure and temperature of a substance to the state of matter (solid, liquid or gas).
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[@imasavage95]

Anyone else watching this for a science online class?

[@voidkiller6107]

ya me

[@genecahdaniellemalines288]

yes :(

[@samistrickland962]

i happened to miss my lesson at school for the past two days, and this helped to explain the concepts very well. thank you

[@continuingtocreate1488]

Sami Strickland me too

[@CharaGamerButterfly]

Same

[@samaalnobani1712]

Amazing expleation for this topic

[@carlosadams5478]

thanks prof I found this video very helpful, thumbs up

[@koneruneelesh79]

thanks for explaining i could understand.

[@bryarramadan8010]

thanks
so professional

[@vandanavvv8229]

Awesome

[@jenjenjenyjen]

Why did my lecturer take an hour to explain phase diagrams and this video did a better job

[@HaamroNotes]

Yea I have also realized that instead of wasting my time and money on clg if I could read from yt then I would have better understanding also my parents hard earned money would be saved.

[@gongon4393]

what pressure? atmospher pressure or vapour pressure?

[@mnswz3140]

thanks so much man

[@lorenzoemanueletomasello215]

Thanks!

[@nidhiagrawal3354]

Ok, I understood all this but how can we derive the phase diagram of a molecule? Do we just have to experiment at every single presure and temperature or can we infer the boundaries of its phase diagram from the chemical properties of the molecule? Is there even a closed form for the equation of the boundaries?

[@DezVillalobos]

I actually don't know the answer to this question, but I am super interested to know. If I had to guess, they would probably test several pressures at a constant temperature and then plot it as some kind of function that can be tested, which makes sense because we know that pressure and temperature are related. Maybe a function of vapor pressure for boiling point? I am just guessing.

[@user-od3ql4wr8e]

.

[@derek8036]

Thanks a lot

[@chriswesley594]

This diagram is wrong. Water's melting point line slopes up to the right - it has a negative gradient.

[@peteredward2547]

Exactly.

[@natnaelzeray3673]

@@peteredward2547 can you explain why? I don't understand. It's okay if you can't

[@peteredward2547]

@@natnaelzeray3673 , for water's melting point/freezing point curve has a negative gradient, because it's melting /freezing point is inversely proportional to the pressure. Ice density is lower than water,because ice volume is greater than water due to hydrogen bond. By increasing the pressure the equilibrium will shift to the left, since it favours higher volume ...

[@tylercrowley2559]

@@natnaelzeray3673 I’m not 100% sure but I think it’s because water expands when it freezes and therefore needs to do work on the surroundings to freeze. Since work can be expressed as pressure multiplied by volume, increasing the pressure increases the work it would need to do therefore it often will not freeze

[@charliebby6951]

​@@natnaelzeray3673 Because water makes longer hydrogen bonds in the solid phase than in the liquid phase, so the solid is less dense than the liquid, and thus if pressure increases it will "squeeze" the solid water into liquid.

[@depturreptic3512]

Please know if you are asked to plot like hydrazine gas

[@TheScienceClassroom]

🤔

[@muhammadhuzaifarizwanullah6791]

Thanks sir. It helps

[@TheScienceClassroom]

😃

[@Alchemyq8]

Thanks 🌹

[@TheScienceClassroom]

🤗

[@detuyaanton1838]

✌

[@trevorbilak-sackin792]

john krasinski?

[@To_WW]

Pog

[@tazwarcool]

Triple point of water is 0.01 degree centigrade. According to your diagram, it looks like triple point is just below 0 degree centigrade. Hence, incorrect phase diagram.
Secondly, the "steam" we see is actually condensed droplets of water. The real gaseous water/ water vapor cannot be seen as it is colorless/ invisible to naked eye.

[@nidhiagrawal3354]

For your first part of your comment, he forgot to mention that the phase diagram wasn't to scale. It isn't incorrect, it's just not to scale but I get what you mean.

[@Flexasnipe]

翔哥藥師

[@user-wr5kj3ug8i]

PewDiePie: “Gordon Ramsey Vs Fake Italian” has

[@TheScienceClassroom]

🤔

[@JustinHocking]

"aboat" xD

[@mccalderbros5647]

NHS anyone?

[@imasavage95]

Ok

[@yamunadhakal122]

in science, nothing "sucks" 4:42 it only pulls and pushes.

[@nickiuy655]

u sound like mordecai from regular show

[@user-od3ql4wr8e]

We need caption ytttttttttt

[@adilali1597]

that is all wrong

[@shantakumari1503]

this is wrong I guess