Doctor Campbell's Science Demo - Sublimation of dry ice

[timrtz20]

Awesome video, I don't know why anybody would be a hater

[lukeoelmo]

hi class its me

[xxruthfanxx]

cool. chemistry is awesome

[LuxusRattery]

This is a fantastic video that I have used in my Physics lessons when we can't get hold of dry ice. Your video has made a difference to hundreds of budding young scientists as it really captured their imaginations and helped them understand more about sublimation. Thank you very much on their behalf

[dan110024]

With your little air hockey example... Theoretically, if you had an environment with 0% moisture content, would it not let off gas? What I'm getting at is, is it letting off gas when it's not in water because of the moisture content in the air? Or have I got it completely wrong? :)

[jadenjaden]

@dan110024 Completely wrong, you should probably slap yourself and then read what you wrote again.

[dan110024]

What's with people debating what he's qualified in? Youtube comments never cease to amaze me. ...and Driert-Ice? LOL!!!!

[TheMistaJoka]

This guy creeps the shit outta me... I wound;t want him anywhere near me with no Gas syringe

[J0se4Jesus]

you people are jerks. Leave him freaking alone.

Hi, Doctor Campbell, thanks for the vid! It was interesting.

[mooodflow]

retard. its called driert ice

[Jambell]

@mooodflow What the hell do you think driert means? Are you trying to use a computer whilst wearing sheep skin gloves? If so, take them off.

[CubsBabeEmilyJ]

no he is not dumb he is just emglish and trying to act funny

[hgm5150]

is he dumb

[Richkid10]

tiara was here-!IJji mk,

[Richkid10]

this sucks big fat camel dickkkkkkkk

[senex92]

stronzo

[ericgarner92]

You're not a doctor, you douche

[Jambell]

Hey "Eric" - who you calling a douche? I do have a philosophy doctorate - does that count?

Anyhow, thanks for watching...

James

[Lokivoid]

"I do have a philosophy doctorate - does that count?" No it does not.

[goonodeath]

@Lokivoid LOL.

[CubsBabeEmilyJ]

anytime

[almgp26]

@Jambell u have a philosophy doctorate and you are trying to teach chemistry?? that is called a douche...

[Jambell]

@almgp26 It's better than that - My doctorate was in microbial proteomics :)

[almgp26]

@Jambell ok then why you said you have one on philosophy? btw the way you are trying to be super funny on that video, not cool, hope you accept critics

[Fsunka]

@almgp26 He said a philosophy doctorate (i.e. a PhD) not a doctorate in philosophy.

[ValentineQ14]

@almgp26 Yo moron, he has a PH.D, meaning a Doctor of Philosophy. It doesn't mean he studied philosophy.

[aj200820082008]

can someone tell me how to get dry ice pleeeeeaaaase??

[arnasonm]

go to a large grocery store and ask to buy some. you can probably get it for $1/lb or so

[ArkAngel993628]

someone said that it was illegal to own, unless u were authorized to have it

[arnasonm]

They were wrong.

[RichmondScienceFilm]

Excellent - I love watching these. Keep 'em coming, Andrew

[franceskakills]

dude he makes a fun teacher outta him. haha i hope he knows physics lmao

[brillweb101]

kinda weird why not make a bomb from it instead kinda gay to

[jkekl]

The first shot kind of creeped me out, but overall well done. I like your enthusiasm. I would like your video even more if you went a little more in-depth on the science behind what we are seeing. For example, why does sublimation occur at room temperature for dry ice, but not for wet ice? As a graduate student in the sciences myself, the main thing I love about science is the *understanding behind* the cool phenomena we see, not just the phenomena themselves.

[ArkAngel993628]

its because the freezing point and the melting point (or in thise case, the sublimating point) is far lower than that of the wet ice

[moush31]

Who says he has a degree?

[lazyworminthegrass92]

can u post a video of deposition, the reverse like gas to solid because i can't really picture that happening and ur really good at explaining stuff:-D

[KrispyKangaroo]

It's hard to demonstrate, because the volume of a solid is much smaller than the volume of a gas, so this particular phase change is hard to observe. A simple example, however, is the formation of frost.

[DelphaLune]

Try lowering your eyebrows and see how it feels.

Nice video! I particularly like the "air hockey" dry ice example.

[toad2007]

cool

[stepney130]

you need to get out more, fancy a pub quiz?

[slayer0273]

voice sux, but good job.

[rudmop]

Good Job ;)