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But I think we've had this conversation before. If you keep adding wood to a fire it doesn't mean wood is not being added or burned if the fire looks the same after three days. What the fire looks like is internal energy. The wood added is heat in. The wood burnt is heat out. As usual you're missin...

Fool wrote: ↑Sat May 25, 2024 12:29 pm ...

Throw a red hot bolt into a cup of water. The water gets hotter. The bolt gets colder. The two reach a common final temperature between the two.

...

My point is, you have to throw the hot bolt into the water.

The heat doesn't just jump off the bolt and head for the water on its own.

gases have a temperature. Temperature is manifest by kinetic energy. Contained Kinetic energy is stored energy. It is not heat. It is not work. It is called internal energy. A spinning flywheel doesn't have work in it, it has stored kinetic energy, internal energy. Work is just how it got there, or...

... I'm trying to explain and separate the difference between internal energy's total current level, and, energy input/output in the form of work, chemical, mass flow, and heat, E.C.T... All are different in some very important ways, and similar in that they are all energy measured at time in Joule...

Just because you don't understand it, doesn't make it meaningless. Seems like something you've said in the past, about refrigerators. If you want to eliminate squabbling, you probably don't want to enter any discussions. Do you consider a bank balance the same as dollars in? Do you consider a bank ...

Why waste time on these constant idiotic nonsensical debates? If it can't be settled whether or not work lowers internal energy, it's not idiotic or a waste of time as long as it stays on track and civil. I was referring to Matt's comment: ... adding heat TENDS to increase internal energy, and work...

.... The equation: n = (Qh-Qc)/Qh Could be rewritten: n = (Uh-Uc)/Uh Which has nothing to do with heat, only the currently contained internal energy when at the hottest and coldest. For a full cycle: But Tom is assuming it is written: n = (∆Qh-∆Qc)/∆Qh .... Tom likes to equate an energy river to an...

Not sure what you mean. Either energy is transfered into (or out of) the gas or it isn't. Any isothermal process has no net gain or loss of internal energy, only an energy transfer 'thru' gas. So, your "Adding heat increases internal energy, work decreases internal energy." is not always ...

Adding heat increases internal energy, work decreases internal energy. In reality for transfers to or from a gas, work or heat are just different words to describe a transfer of kinetic energy in or out of the gas. Actually identical on a molecular or atomic level. Fool likes to imagine some signif...

But that does not mean that heat converts to work. no direct conversion As far as "heat" is just a manifestation of the kinetic energy transfered from the hot plate to the gas molecules, and "pressure" is also just a manifestation of the same kinetic energy of the gas molecules,...

matt brown wrote: ↑Fri May 24, 2024 12:01 pm ...so each molecule weighs the same regardless of temperature,...

Temperature is "average kinetic energy" of the gas molecules is it not?

And Tom, I don't see any evidence that heat will not flow as fast as it can to reach equilibrium, depending on the resistance of the medium it has to work with. If that were the case, I think the universe would have reached equilibrium eons ago. I think this general assumption, that heat is going t...

A tendency is not an effort.

The general tendency for heat to disperse in all directions has been greatly overstated so as to imply that heat makes a bee line for cold just like a river flows downhill. Such a concept is utter nonsense.

Apparently much more heat is lost from the gas due to work output during the power stroke so the energy input from atmospheric pressure on the return stroke is not enough to require any heat rejection on the compression stroke. This is an experimentally observable and verifiable reality regardless o...

Just to be clear, cooling due to transfer of kinetic energy is over and above cooling that may be due to "expansion", simply spreading out the heat over a larger volume. IMO there is no such thing as heat attempting to reach equilibrium. The idea that heat wants to combine with cold, seeks...