Work - Revision history

Carl McBride at 09:22, 5 July 2011

2011-07-05T09:22:53Z

← Older revision		Revision as of 11:22, 5 July 2011
Line 7:		Line 7:
	source of mistakes).		source of mistakes).

	For reversible changes,		For reversible changes, where the system evolves through a succession of equilibrium states, one has

	:<math>\left.dW\right.=-p~dV </math>		:<math>\left.dW\right.=-p~dV </math>

Dduque: W=-pdV on compression or expansion, but always ''upon'' (I am 98% sure)

2009-06-08T09:07:19Z

W=-pdV on compression or expansion, but always ''upon'' (I am 98% sure)

← Older revision		Revision as of 11:07, 8 June 2009
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	The mechanical '''work''', ''W'', performed in ''~~compressing~~'' a gas is given by		The mechanical '''work''', ''W'', performed ''upon'' a gas is given by

	:<math>W = - \int_\alpha^\beta p ~dV</math>		:<math>W = - \int_\alpha^\beta p ~dV</math>

	where <math>\alpha</math> and <math>\beta</math> are points in state space, ''p'' is the [[pressure]]		where <math>\alpha</math> and <math>\beta</math> are points in state space, ''p'' is the [[pressure]]
	and ''V'' is the volume.		and ''V'' is the volume. The mechanical work done ''by'' the gas has the opposite sign (a common
			source of mistakes).

	For reversible changes		For reversible changes,

	:<math>\left.dW\right.=-p~dV </math>		:<math>\left.dW\right.=-p~dV </math>

Carl McBride at 11:12, 21 June 2007

2007-06-21T11:12:30Z

← Older revision		Revision as of 13:12, 21 June 2007
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	For reversible changes		For reversible changes

	:<math>\left.dW\right.=-~~PdV~~ </math>		:<math>\left.dW\right.=-p~dV </math>

	and for irreversible changes		and for irreversible changes

	:<math>\left.dW\right. > -~~PdV~~ </math>		:<math>\left.dW\right. > -p~dV </math>

	[[category: classical thermodynamics]]		[[category: classical thermodynamics]]

Carl McBride at 11:11, 21 June 2007

2007-06-21T11:11:51Z

@@ Line 5: / Line 5: @@
 where <math>\alpha</math> and <math>\beta</math> are points in state space, ''p'' is the [[pressure]]
 and ''V'' is the volume.
 [[category: classical thermodynamics]]

Carl McBride: New page: The mechanical '''work''', ''W'', performed in ''compressing'' a gas is given by : $W = - \int_\alpha^\beta p ~dV$ where $\alpha$ and $\beta$ are points i...

2007-06-21T10:34:56Z

New page: The mechanical '''work''', ''W'', performed in ''compressing'' a gas is given by :<math>W = - \int_\alpha^\beta p ~dV</math> where <math>\alpha</math> and <math>\beta</math> are points i...

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