Link- said:
Internal Energy would be the one that can't be classified as kinetic energy and potential energy such as sensible energy, latent energy, chemical energy and nuclear energy. Latent would be vibration, rotation and translation, that in a macroscopic point of view would be kinetic energy.
Well read from
http://en.wikipedia.org/wiki/Internal_energy#Composition", but I think your a little confused here. For a general fluid, the internal energy can be described as the sum of the translation, rotational, vibration kinetic energies and the potential energies of the molecules within a system. This can be 'broken down' into the energy 'types' you mentioned, but it isn't necessary. So in fact, in a monatomic gas, the total translational kinetic energy of the molecules within a system is the internal energy. I also repeat my early question
"Could you please now explain to me how a single molecule can have internal energy"?
Link- said:
And as I said before,
Sorry if my explanation of how the increase in temperature is proportional to increase in pressure is not the best. Since I don't know the guy or girl who post the interrogant or what knowledge in thermodynamics has I tried to explain it as simple as possible. Is true that is incorrect and misleading.
And as I said before, there is a difference between simplification and simply incorrect. As I said in my previous post, there is nothing wrong with the concept of your argument, just in how you put it. The idea behind your argument is the correct one, but the way your argued your point is incorrect and invalidates your argument.
It is imperative, particularly in Thermodynamics and physics in general, the one uses correct terms. Physical terms have very specific meanings and one must chose which terms to use carefully.
Link- said:
How would you explain this phenomena to a kid with a middle school science knowledge? No thermodynamics, no heat transfer and no equations.
I was use the concept of kinetic theory, but
correctly put.
Link- said:
PD. https://www.physicsforums.com/showpost.php?p=1595186&postcount=7"
But Q-W=\DeltaU
Thank you for the compliment. It looks like Doc's got your comment covered, however, you should notice that in that post I defined
W as the work on
on the system, it is simply a matter of sign convention. After reading my post, I hope you now understand the difference between heat, temperature and internal energy.
To cronusmin
Just to summarise so that you need to read anymore than necessary. Up to now, we have mentioned two ways in which you can explain the increase in temperature,
(1)
Consider the first law, how would you increase the pressure given that V is constant? What kind of device would you use? What does that device need to operate?
(2)
Kinetic Theory, use the concept that Link introduced, but use the proper terms correctly. Consider how the kinetic energy (and hence temperature) of the gas molecules would change if you increased the number of molecules in the same volume.
