Editing First law of thermodynamics
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For an adiabatic system (i.e. a system in which no heat enters or leaves) | For an adiabatic system (i.e. a system in which no heat enters or leaves) | ||
then if two bodies of different [[temperature |temperatures]] are placed in contact | then if two bodies of different [[temperature |temperatures]] are placed in contact | ||
and then separated then the sum of the heat within the system is unchanged | and then separated then the sum of the heat within the system is unchanged. | ||
This is conservation of energy. The first law of thermodynamics does not | This is conservation of energy. The first law of thermodynamics does not | ||
provide information on the direction of the heat transfer (if any). | provide information on the direction of the heat transfer (if any). |