Phase Diagrams

[@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

[@imasavage95]

Anyone else watching this for a science online class?

[@voidkiller6107]

ya me

[@genecahdaniellemalines288]

yes :(

[@erickgomez7775]

The melting line for water should hava a negative slope because water expands (this means less density) when it freezes.

[@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.

[@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.

[@gongon4393]

what pressure? atmospher pressure or vapour pressure?

[@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?

[@Coneydog7]

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.

[@Sajooo-p7e]

.

[@depturreptic3512]

Please know if you are asked to plot like hydrazine gas

[@TheScienceClassroom]

🤔

[@samaalnobani1712]

Amazing expleation for this topic

[@muhammadhuzaifarizwanullah6791]

Thanks sir. It helps

[@TheScienceClassroom]

😃

[@bryarramadan8010]

thanks so professional

[@Alchemyq8]

Thanks 🌹

[@TheScienceClassroom]

🤗

[@vandanavvv8229]

Awesome

[@derek8036]

Thanks a lot

[@carlosadams5478]

thanks prof I found this video very helpful, thumbs up

[@mnswz3140]

thanks so much man

[@koneruneelesh79]

thanks for explaining i could understand.

[@lorenzoemanueletomasello215]

Thanks!

[@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.

[@yamunadhakal122]

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

[@trevorbilak-sackin792]

john krasinski?

[@mccalderbros5647]

NHS anyone?

[@imasavage95]

Ok

[@ชาคริตสกุลคง-ร1ม]

PewDiePie: “Gordon Ramsey Vs Fake Italian” has

[@TheScienceClassroom]

🤔

[@Flexasnipe]

翔哥藥師

[@JustinHocking]

"aboat" xD

[@nickiuy655]

u sound like mordecai from regular show

[@adilali1597]

that is all wrong

[@detuyaanton1838]

✌

[@To_WW]

Pog

[@Sajooo-p7e]

We need caption ytttttttttt

[@shantakumari1503]

this is wrong I guess