QUestion

Question

QUestion

raffle_snaffle · Answer

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raffle_snaffle · Answer

I want to discuss these conceptual problems.

raffle_snaffle · Answer

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raffle_snaffle · Answer

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raffle_snaffle · Answer

@IrishBoy123

osprey · Answer

encl are some scribbles which may be of help.
I don't know if they're right ... 1 are the answers (guesses ????) and 1 a is a little background to the way I'm trying to think about these problems.

raffle_snaffle · Answer

@IrishBoy123

raffle_snaffle · Answer

Welp, I got most of the questions answered.

raffle_snaffle · Answer

Hello. I've got most of these answered. Can we discuss irriversible and reverisble?

osprey · Answer

reversible is an IDEAL, a bit like an ideal gas. They don't exist outside a theoretical physicist or maths "brain". It's a device to make things "easier" for them. in the case of gases, it give "simple" formula such as the ideal gas equation (cf, eg, the Van der Waals version and others).
Ideal tends to imply SLOW. Thermo equilibrium states always. No dissipative effects such as friction. They say that that means that the process can go in either direction and so is reversible. 
Irreversible implies not slow, not in equilibrium always, dissipation everyhere (in fact a complete mess such as in a car engine ?)

osprey · Answer

the idea seems to be that in the case of gases, the BENCHMARK is the ideal/idealised gas, and real gases are compared to the ideal model. The differences give clues to what is actually going on in the case of the real gas, and real processes. 
Similar thing with engines and fridges and other bits of thermo.
Choose the process/cycle - Otto, Rankine etc - and then compare their thermo perfomances with that of an idealised "perfect" cycle - Carnot, perhaps. 
So it COULD be that Ideal gases are to gases, what Carnot engines are to engines and fridges. 
In the Carnot case, it may help to think about distinguishing between thermo efficiency and the (more attractive ?) high peforamance motor sport cases. 
In the case of an engine designed to race in a formula 1 event, the effects on the engine might be totally different to the same engine designed and operated under Carnot conditions. One is glamorous ...

osprey · Answer

ps what's the new picture ? a robot of some kind ?