Engineering Thermodynamics
In an extensive property of a thermodynamic system

Extensive work is done
Extensive energy is utilized
Extensive heat is transferred
None of the listed here

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Engineering Thermodynamics
An isolated system is one in which

Mass does not cross boundaries of the system, though energy may do so
Mass crosses the boundary but not the energy
Neither mass nor energy crosses the boundaries of the system
Both energy and mass cross the boundaries of the system

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