This discussion is closed.
misty
Badges: 2
Rep:
?
#1
Report Thread starter 17 years ago
#1
Define Specific Heat capacity, and show an awareness of the principle of its determination by an electrical method.

Anyone know what this electrical method is? Just to hopefully point me in the right direction?
0
GeneralGrievous
Badges:
#2
Report 17 years ago
#2
(Original post by misty)
Define Specific Heat capacity, and show an awareness of the principle of its determination by an electrical method.

Anyone know what this electrical method is? Just to hopefully point me in the right direction?
presumably the electrical method would be to stick a heating element (usually a rod of some sort) into a known mass m of copper (or another suitable metal), driving a constant current I through it at a constant potential difference V for a certain time t, measuring the difference in temperature T for the copper. the energy supplied to the copper E = IVt. by the SHC formula, E=mCT, so IVt=mCT => C = IVt/mT
0
hornblower
Badges: 6
Rep:
?
#3
Report 17 years ago
#3
(Original post by misty)
Define Specific Heat capacity, and show an awareness of the principle of its determination by an electrical method.

Anyone know what this electrical method is? Just to hopefully point me in the right direction?
S.H.C. is the energy change when 1 kg of substance has its temperature raised by 1 K. It's symbol is c units are J K^-1 Kg^-1.

According to the first law of thermodynamics: heat lost = heat gained,

so: Electrical work = Heat gained by substance

therefore: IVt = mc(delta theta)
0
_ELiTeCaRR_
Badges: 0
Rep:
?
#4
Report 17 years ago
#4
(Original post by GeneralGrievous)
presumably the electrical method would be to stick a heating element (usually a rod of some sort) into a known mass m of copper (or another suitable metal), driving a constant current I through it at a constant potential difference V for a certain time t, measuring the difference in temperature T for the copper. the energy supplied to the copper E = IVt. by the SHC formula, E=mCT, so IVt=mCT => C = IVt/mT
i did this for coursework at A2 and got very good in it, if you need any of my coursework i'll quite happily send it to you
0
_ELiTeCaRR_
Badges: 0
Rep:
?
#5
Report 17 years ago
#5
( To Misty )
0
MAGICJIM
Badges: 0
#6
Report 17 years ago
#6
Hey if u GuyS n gAlz need soome help with Any questions i know a good webpage WhiCh will create programs for u which can Be created however u want, all you have to do is email what you need. there are samples on it.

www.geocities.com/softpro101
0
X
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

If you haven't confirmed your firm and insurance choices yet, why is that?

I don't want to decide until I've received all my offers (127)
34.89%
I am waiting until the deadline in case anything in my life changes (48)
13.19%
I am waiting until the deadline in case something in the world changes (ie. pandemic-related) (22)
6.04%
I am waiting until I can see the unis in person (36)
9.89%
I still have more questions before I made my decision (47)
12.91%
No reason, just haven't entered it yet (43)
11.81%
Something else (let us know in the thread!) (41)
11.26%

Watched Threads

View All
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise