I have been searching through the internet for a long time. And now I finally got the answer. Pity the school doesn't provide us with this basics. It would be so helpful if you upload a video on the difference between gas and vapor.
That would be an interesting video to do. I'll put it on my list! You might find this useful in terms of boiling (one of my best videos of all time): th-cam.com/video/Ag4lLUXKuSM/w-d-xo.html
still doesn`t explain the mechanism of why in evaporation lets say water at 40 C 1 atm, we know water boils at 100 C at 1 atm but why can evaporation converts the surface water molecules at only 40 C, does the presure drops at the surface?
Yes, boiling is a rapid form of evaporation occurring at a specific temperature throughout the liquid, while evaporation happens more slowly at the surface and can occur at any temperature, so all boiling involves evaporation, but not all evaporation involves boiling.
Thanks, David! I'm trying to do these types of videos more often. I'd say I spend an hour researching they types of questions and confusions people have about the topic and then about two hours to record and edit.
@@wbreslyn Wayne, Your dedication is much respected by me and am sure by others. Do you get many Q's from HS or college students to help with a Q as I sent some time ago?
It's interesting. I'd say about 80% of are "thanks for helping" type comment. Of the other 20% I'd say 15% are fairly simple questions and often I can direct them to a video I've already done. But the last 5% take some thought. In the past 24hr I've gotten 54 comments (I just counted) but it's a very slow time of the year!
This is very helpful. I'm not an expert, but something else comes to mind, which is kind of a branch of the last point, about the thermal energy coming from surroundings. I'm going to steer this toward evaporative cooling, which is how sweating helps us not poach our own muscles to death when doing an exertion-bean-thing. Because intuitively it seems so mysterious but it makes sense if you break it down. In any kind of a thing, but most interestingly for this discussion we'll say a liquid, there are molecules of the stuff all zipping about in different trajectories at different speeds. Temperature is kind of an "average" of the activity. There are things going faster and there are things going slower. Since it's an average, if the faster things leave the whole thing and never come back, the result is that the average measurement is a little slower. Slower is colder. That's evaporative cooling. If temperature is a head count, and the hotter heads leave because of evaporation, the final count is lower. A reduction in temperature.
Well stated! The Boltzmann Distribution provides a nice summary: chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Kinetics/03%3A_Rate_Laws/3.01%3A_Gas_Phase_Kinetics/3.1.02%3A_Maxwell-Boltzmann_Distributions
That is great to hear! You might find this useful as well, it's something my hs chem students helped me with: th-cam.com/play/PLZR1BGWBaZ1xfggrpVpbXVFchALwL9qMh.html
@@deeperloveforphysics9513 So when the water evaporates, the more energetic water molecules are leaving the liquid. That lowers the temperature of the water since the overall kinetic energy is lower. You might like this video: th-cam.com/video/Ag4lLUXKuSM/w-d-xo.html
I'm on a bit of a break right now. I did publish this paper recently, related to a method for studying students ideas about science concepts. pubs.rsc.org/en/content/articlelanding/2020/rp/c9rp00145j#!divAbstract Hopefully more soon!
Thank you so much Wayne I always watch your videos and I’m subscribed to your channel the videos you post are really helpful and help me understand things I learn in school
We're no strangers to love You know the rules and so do I (do I) A full commitment's what I'm thinking of You wouldn't get this from any other guy I just wanna tell you how I'm feeling Gotta make you understand Never gonna give you up Never gonna let you down Never gonna run around and desert you Never gonna make you cry Never gonna say goodbye Never gonna tell a lie and hurt you We've known each other for so long Your heart's been aching, but you're too shy to say it (say it) Inside, we both know what's been going on (going on) We know the game and we're gonna play it And if you ask me how I'm feeling Don't tell me you're too blind to see Never gonna give you up Never gonna let you down Never gonna run around and desert you Never gonna make you cry Never gonna say goodbye Never gonna tell a lie and hurt you Never gonna give you up Never gonna let you down Never gonna run around and desert you Never gonna make you cry Never gonna say goodbye Never gonna tell a lie and hurt you We've known each other for so long Your heart's been aching, but you're too shy to say it (to say it) Inside, we both know what's been going on (going on) We know the game and we're gonna play it I just wanna tell you how I'm feeling Gotta make you understand Never gonna give you up Never gonna let you down Never gonna run around and desert you Never gonna make you cry Never gonna say goodbye Never gonna tell a lie and hurt you Never gonna give you up Never gonna let you down Never gonna run around and desert you Never gonna make you cry Never gonna say goodbye Never gonna tell a lie and hurt you Never gonna give you up Never gonna let you down Never gonna run around and desert you Never gonna make you cry Never gonna say goodbye Never gonna tell a lie and hurt you
These kind of videos are helpful.
Showing difference and similarity.
Thanks
You are most welcome!
I have been searching through the internet for a long time. And now I finally got the answer. Pity the school doesn't provide us with this basics. It would be so helpful if you upload a video on the difference between gas and vapor.
That would be an interesting video to do. I'll put it on my list!
You might find this useful in terms of boiling (one of my best videos of all time):
th-cam.com/video/Ag4lLUXKuSM/w-d-xo.html
still doesn`t explain the mechanism of why in evaporation lets say water at 40 C 1 atm, we know water boils at 100 C at 1 atm but why can evaporation converts the surface water molecules at only 40 C, does the presure drops at the surface?
Thanks I leant a lot from your video 😊
You're welcome 😊
For differences what does the last two ones mean???
Ok but boiling is a still just a more rapid form of evaporation right? So all boiling is evaporation but not all evaporation os boiling correct?
Yes, boiling is a rapid form of evaporation occurring at a specific temperature throughout the liquid, while evaporation happens more slowly at the surface and can occur at any temperature, so all boiling involves evaporation, but not all evaporation involves boiling.
Nice and clear. I see you are expanding your explanations in the area of Chemistry.:) Q: how long does it/ did it to make this video ? Peace David. :)
Thanks, David! I'm trying to do these types of videos more often. I'd say I spend an hour researching they types of questions and confusions people have about the topic and then about two hours to record and edit.
@@wbreslyn Wayne, Your dedication is much respected by me and am sure by others. Do you get many Q's from HS or college students to help with a Q as I sent some time ago?
It's interesting. I'd say about 80% of are "thanks for helping" type comment. Of the other 20% I'd say 15% are fairly simple questions and often I can direct them to a video I've already done. But the last 5% take some thought. In the past 24hr I've gotten 54 comments (I just counted) but it's a very slow time of the year!
@@wbreslyn Thank you for the break down Dr. B
But in both condition molecules have to have same energy to get evaporated?
You just gained a subscriber 🔥🔥🔥
Like why vapor pressure needs to equal atmospheric pressure to boil? what is logic behind it?
This is very helpful. I'm not an expert, but something else comes to mind, which is kind of a branch of the last point, about the thermal energy coming from surroundings. I'm going to steer this toward evaporative cooling, which is how sweating helps us not poach our own muscles to death when doing an exertion-bean-thing. Because intuitively it seems so mysterious but it makes sense if you break it down.
In any kind of a thing, but most interestingly for this discussion we'll say a liquid, there are molecules of the stuff all zipping about in different trajectories at different speeds. Temperature is kind of an "average" of the activity. There are things going faster and there are things going slower. Since it's an average, if the faster things leave the whole thing and never come back, the result is that the average measurement is a little slower. Slower is colder. That's evaporative cooling. If temperature is a head count, and the hotter heads leave because of evaporation, the final count is lower. A reduction in temperature.
Well stated! The Boltzmann Distribution provides a nice summary:
chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Kinetics/03%3A_Rate_Laws/3.01%3A_Gas_Phase_Kinetics/3.1.02%3A_Maxwell-Boltzmann_Distributions
Thank you for the explanations, helpful indeed! I would argue though that "surroundings" are an "external source", too.
Thank you so much for helping me, your explanation is very detailed.
Glad it was helpful!
am the first love u the followers of this apprecoate channel from somalia 🇸🇴
Thanks so much!
Isn't sublimation how we get freeze-dried foods?
Yep, you got it! Usually done under a vacuum.
this video helped with my term exam.
thanks
Mine too
Am high school physical science teacher. I'm m going to use this. thanks
That is great to hear! You might find this useful as well, it's something my hs chem students helped me with: th-cam.com/play/PLZR1BGWBaZ1xfggrpVpbXVFchALwL9qMh.html
Thank you man! I have an exam tomorrow and I was really worried
This really helped for my end of year exams as my science teacher wasa ill half the year!
Glad it helped!
You are the best teacher
Thank you!
Sir, how do you explain temperature drop while boiling in vacuum?
Evaporation is a cooling process. Lower pressure means increased rate of evap.
@@wbreslyn I understand all this Sir, but why is temperature not constant during boiling in vacuum?
@@deeperloveforphysics9513 So when the water evaporates, the more energetic water molecules are leaving the liquid. That lowers the temperature of the water since the overall kinetic energy is lower.
You might like this video: th-cam.com/video/Ag4lLUXKuSM/w-d-xo.html
Thank you, Dr B. Are you now researching?
I'm on a bit of a break right now. I did publish this paper recently, related to a method for studying students ideas about science concepts.
pubs.rsc.org/en/content/articlelanding/2020/rp/c9rp00145j#!divAbstract
Hopefully more soon!
Great job, Dr. Have you done any research before that?
Thanks 👍😍😍
Welcome 😊
You the man Batman!
Thanks! You'd be surprised how many times I get comments that include the word Batman!
Thank you so much Wayne I always watch your videos and I’m subscribed to your channel the videos you post are really helpful and help me understand things I learn in school
I need this! Thanks
Thanks DR B....
My pleasure!
Sir please upload redox reaction
It's on my list. This is all I have right now:
th-cam.com/video/JztDt4roAkg/w-d-xo.html
@@wbreslyn thank you
Good video
Thanks!
Very good video!
Thank you very much!
Thank u Dr B 💛
My pleasure!
Great video
Thanks!
Thnx sir
Sir make video on the
Reaction of Sodium hydroxide and acetic acid .
Plz sir
I wanna know about the products
Here you go!
th-cam.com/video/QZo6sPMPg1c/w-d-xo.html
Awesome
Thanks!
only i need loud voice cause i dont hear well
Thank you very much
You are welcome!
Thank you
You're welcome 😊
Clear thank you.
If you do not have the clarity of concept please do not mislead the students.
Plz different between infrasonic and ultrasonic now today is my exam plllllz pllllz
wtf today???
This is the best I can do right now:
en.wikipedia.org/wiki/Ultrasound
en.wikipedia.org/wiki/Infrasound
All the best on your exam!
thanks
@@crunchworks7297 Man you're brave 😅
❤
💜💜💜
Can’t understand
Khan academy?
hello
hi
Hello!
We're no strangers to love
You know the rules and so do I (do I)
A full commitment's what I'm thinking of
You wouldn't get this from any other guy
I just wanna tell you how I'm feeling
Gotta make you understand
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
We've known each other for so long
Your heart's been aching, but you're too shy to say it (say it)
Inside, we both know what's been going on (going on)
We know the game and we're gonna play it
And if you ask me how I'm feeling
Don't tell me you're too blind to see
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
We've known each other for so long
Your heart's been aching, but you're too shy to say it (to say it)
Inside, we both know what's been going on (going on)
We know the game and we're gonna play it
I just wanna tell you how I'm feeling
Gotta make you understand
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
Thank you man! I have an exam tomorrow and I was really worried