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Energy, heat and work (Read 2381 times)
Gerrit-Jan Linker
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Energy, heat and work
09.04.09 at 09:43:46
Energy, heat and work
The energy of a system is a measure of the system's capacity to do work or to supply heat.  
Work is the energy expended during the act of moving an object against an opposing force.
Heat is the energy transferred as a result of a temperature difference between the system and its surroundings.
First law of thermodynamics: The energy of an isolated system is constant.
dU = dq + dw, where
dU is the change of energy in a system
dq = C dT where C is the heat capacity and dT is the change in temperature
dw = dwe - pexdV
dw is the work done on the system.
dwe is the external work done on the system
- pexdV is the p,V work done on the system
General Chemistry, Atkins and Beran
Physical Chemistry, Atkins
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« Last Edit: 10.04.09 at 18:57:01 by Gerrit-Jan Linker »  

Gerrit-Jan Linker
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