Engineering Thermodynamics
According to First law of thermodynamics,

Total energy of a system remains constant
Internal energy, enthalpy and entropy during a process remain constant
Total internal energy of a system during a process remains constant
Work-done by a system is equal to the heat transferred by the system

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

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

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Engineering Thermodynamics
According to Avogadro’s law

The product of the gas constant and the molecular mass of an ideal gas is constant
Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules
The sum of partial pressure of the mixture of two gases is sum of the two
All of these

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