Engineering Thermodynamics
When the gas is heated at constant volume, the heat supplied

Does some external work during expansion
None of these
Increases the internal energy of the gas and increases the temperature of the gas
Both (A) and (B)

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Engineering Thermodynamics
A closed system is one in which

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

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