EXCHANGE OF MATTER/MASS WITH ITS ENVIRONMENT E.G. CLOUDS AND RAIN
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CLOSED SYSTEM?
DOESNT EXCHANGE MATTER WITH ENVIRONMENT
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ISOLATED SYSTEM?
DOESNT EXCHANGE MATTER OR ENERGY WITH THE ENVIRONMENT
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CAN A CLOSED SYSTEM BE CLOSED?
SOME SYSTEMS CAN BE CLOSED ON SRT TIME SCALES BUT OPEN OVER LONG TIME SCALES
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WHEN CAN A SYSTEM BE CLOSED?
A SYSTE CAN BE CLOSED WHEN ITS LARGE ENOUGH TO IGNORE MIXING WITH ENVIRO, CLOSED SYSTEMS ARE PART OF A LARGER HOMOGENOUS SYSTEM BTU MIXING WITH THE ENVIRO WONT CHANGE ITS PROPERTIES.
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HOMOGENOUS SYSTEM?
EVERY INTENSIVE VARIABLE HAS THE SAME VALUE FOR EVERY POINT IN ASYSTEM I.E. NO GRADIENTS IN STE VARIABLES PRESENT. EXTENSIVE PROPERTIES ARE PROPORTIONAL TO THEIR MASSES.
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