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/sci/ - Science & Math

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10629495 No.10629495 [Reply] [Original]

Half my class says isothermal the other half says adiabatic

What does /sci/ think?

>> No.10629505
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10629505

>>10629495
Adiabatic, 100%. You never used a bike pump? They get warmer with use. Also, >>>/sqt/

>> No.10629509

>>10629505
Shit, now I have actually read the problem. If you somehow devise a way to keep the system at a constant temperature, it is isothermal by definition. The way the question is phrase it would be "isothermal"

>> No.10629524
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10629524

Is this a fucking trick question or what?

>> No.10629533

If the temperature doesn't change then it was definitely isothermal.

>> No.10629554

>>10629524
It's not a very good question. That passage right, under normal circumstances pushing down on the handle of a bike pump would be adiabatic compression. However, in the problem in the OP, the question states that temperate is constant. Normally bike pumps heat up but now you have a special one that has somehow transfers heat out of the system (which is explicitly NOT what adiabatic systems do). It is said to be at constant T so yeah, it's isothermic.

>> No.10629555

>>10629495
It could be either until you observe it.

>> No.10629568

>>10629495
>T does not change
Do we have a magical pump that does not create heat or is the excess heat getting transferred out to cool it down?

>> No.10629594
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10629594

So, ultimately, the question is fucked in its wording and in reality it would be an adiabitic process but in this case it is isothermal

>> No.10629595

>>10629495
No temperature change = the definition of isothermal. Adaiabatic means no heat transfer. So it’s Isothermal

>> No.10629597

>>10629594
Basically. If you compress a real-life bike pump *very* slowly, you could also call it isothermic because heat will transfer through the walls of the cylinder faster than the air is compressed.

>> No.10629610

Does isothermal imply adiabatic? And vice versa?

>> No.10629619

>>10629610
Definitely not

>> No.10629712
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10629712

isothermal adiatic bullshit