What is Heat, Specific Heat & Heat Capacity in Physics? - [2-1-4]
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- เผยแพร่เมื่อ 25 พ.ย. 2024
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In this lesson, you will learn the difference between heat, temperature, specific heat, and heat capacity is in physics. Heat has units of energy, in Joules, and measures the transfer of kinetic energy on a microscopic level from one material to another. Specific heat is the amount of heat needed to raise a specific amount of material a specific temperature, usually 1 degree. Using these concepts, we can calculate how much heat energy is absorbed or released when an object increases or decreases its temperature. Fundamentally, it is related to the conservation of energy law..
![What is Energy & Work in Chemistry & Physics? - [1-1-6]](http://i.ytimg.com/vi/kSKJR1qqSCQ/mqdefault.jpg)
At one time, I was considered to be a heat expert where I worked. I have long since retired and have lost a lot of info that used to be second nature. Thank you for bringing back most vividly a lot of that information. Although I'm now a fossel in my field, it is so refreshing to have your insight on all subjects. BTW, I hold a degree in Electronics Engineering Technology and am certified by the ISCET.
Materials engineer and when I was doing my hnd this subject blew my brain. The way you have explained this is fantastic, thanks for the videos.
I studied very similar applications in Machining School when we touched on heat and shrink fits. We had to calculate how much heat was needed to expand steel when installing sleeves and bearings. Love your videos. 🙏😌
Mi too
@@MwesigwaPeter-vc9yn yu tu, mi tuu🗿
The concepts are truly understandable for everyone who had watched video before
The difference in temperature from the substance should have been (500-t) because it's obviously giving out heat to the water hence it final temperature will be less than 500.The temperature difference water will be (t -22)
Generally great discussion. But I'd offer not discussing time as part of it takes away from some aspects, and may even make some statements wrong. With enough time, and assuming a closed system, a small burner CAN heat a significantly large piece of copper. With time the energy in the copper will equalize throughout, but while heating, the material local to the burner will have a different temperature from that of the material at the slab extremities. You started to touch on this while talking about thermal conductivity. And the car example is great, but the car does not stop in zero seconds, and therefore the energy transferred from the car to the brakes occurs over time. Quenching a horseshoe in water versus oil impacts the resulting horseshoe due to the rate at which the horseshoe is cooled.
but thx you very much you help me soooo MUCH !
if without you i'm going be lost
الله يحفظكم
what is the difference between work done on the system and work done by the system in physics?
I have done a good deal of searching on the Internet, and I have not found a good explanation of the reasons why materials are better conductors of heat than others. It would be nice if you could provide this explanation, something a little bit more detailed than it has to do with what happens at the atomic or quantum level. Maybe this would require even a short addendum lecture, but it would be a nice contribution, as I did a good deal of searching and could not find anyone explaining this anywhere.
It’s to do with the way materials are bonded, metals are good conductors of heat because in metallic bonding the electrons aren’t bonded tightly to the atoms, they operate more like a cloud of electrons, whereas ionic and covalent bonded materials the valence electrons are bonded tighter to the material at the atomic level.
@@tyrone3668 That makes sense. Thank you.
You have a nice combination of theoretical and "practical. Good work.
Thanks alot....your explanations are clear and comprehensive
Where did you get the amount of gravity 9.8 ?
Can you give some hint on it
9.8 is the constant unit of gravity u just have to know it
I just learnt that any unknown variables substitute into the equation, would definitely cancel out just keep on solving🎉
This reminds me of chemistry exothermic and endothermic reactions 😂
Yea the first law of thermodynamics!!
Thank you for very interesting lesson.
So detailed. Thank you sir.
at 9:38 would Temperature not be measured in Degree Kelvin ?
THANK YOU... SIR...!!!
Sorry there's something I don't understand there
Why did you divided the heat of the water by that of the heat of the pallet?
To get the number of pellets which caused the temperature of the water to raise from 20 to 25.
what is the difference between heat capacity and specific heat?
Heat capacity is the amount of heat required to increase the temperature of any given mass of the body by 1degrees Celsius and SPECIFIC HEAT capacity is the amount of heat required to increase the temperature of 1kg mass of a substance by 1degrees Celsius😊
math is a so easy for world
Can you write these definition before solving the problem
You said the lead pellets have a mass of 1gram and are heated to 200 degree Celsius. I thought it means the final temp will be 200 degree Celsius (since it is heated to)
The final temperature will be 25 due to the fact that they are in water and are losing their initial heat ,I think you missed a point in the explanation in the being of the video 😊
Thanks sir once again
44:13 Is this a mistake? -172.2 - 83720 does not equal -83540... great lecture btw!
-83899.2 is the answer. Transpose the 83720 to left side, now they have same negative sign. Adding it you will get -83899.2
I can only recall in my study ( Physics 1 and Refrigeration 2 )
the formula :
Q = mc◇T ( Btu ) long time ago.
Thank you Sir Jason
Thank you
Thanks
Im from u.s. can this be done in btus/lb *f ?
Nice 👍
Thank you! Cheers!
Sir I don't know how calculate thermal expansion
I don't know how to find the specific heat capacity
Sorry to be a pig in the mud, but you really should be using "delta Q". Just using Q might confuse some students into thinking that you a referring to total amount of heat in the object rather than the amount added or subtracted. "delta Q" clears that up. i.e. the "delta T" forces the use of "delta Q"
I think your point is actually very well taken, and I agree. Thanks again so much for your feedback, jason.
@@MathAndScience Love your approach. It is important to build from the ground up in small steps.
Dude really saved my ass
Just wait for the answer n you'll see the answer
Good men
heat is mean energy
if H=-10 mean is heating
if H=+10 mean is cooling
see i am true science !
maybe not :(
My exam is 2 minutes from now 😅
"Heat transfer is energy in transition by virtue of temperature difference."
25:16
How did we get 10 to the power 5?
How to find 4186 which is value of c
Who has drum brakes on a modern car?
Trucks
❤❤
Am thinking the specific heat capacity is 4.18kg not 4186kg an confused
Guuuuuuuuu😂😂😂😂😂😂
I don't know how to find the specific heat capacity
Massage me directly now for it
Bro, you should use this formula Q = m×c× change in temperature.
Thank you
Thanks alot professor
I don't know how to find the specific heat capacity
It is given to you. You don't have to find it out. Each material has a constant heat capacity