Engineering Thermodynamics
All perfect gases change in volume by 1/273th of its original volume at 0°C for every 1°C change in temperature, when the pressure remains constant. This statement is called

Gay-Lussac law
Boyle's law
Joule's law
Charles' law

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Engineering Thermodynamics
A closed system is one in which

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

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Engineering Thermodynamics
According to Avogadro's law, for a given pressure and temperature, each molecule of a gas

Occupies volume inversely proportional to its specific weight
Occupies volume proportional to its specific weight
Occupies volume inversely proportional to its molecular weight
Occupies same volume

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