First law of thermodynamics (AQA A-Level Physics): Flashcards
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First law of thermodynamics equation
First law of thermodynamics equation
in first law
in first law
Energy added to system via heating or cooling
in first law
in first law
Change in internal energy of system
in first law
in first law
Work done by system on surroundings
Positive means
Positive means
System does work on surroundings (expansion)
Negative means
Negative means
Work is done on system (compression)
Positive means
Positive means
Energy enters the system
Negative means
Negative means
Energy leaves the system
Open system feature
Open system feature
Energy and matter can cross the boundary
Closed system feature
Closed system feature
No gas enters/leaves; energy may transfer