Engineering Thermodynamics
Compressed air coming out from a punctured football

Remains at the same temperature
Becomes cooler
May become hotter or cooler depending upon the humidity of the surrounding air
Becomes hotter

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Engineering Thermodynamics
Mond gas is obtained by

Passing air and a large amount of steam over waste coal at about 650°C
Passing steam over incandescent coke
Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
Carbonisation of bituminous coal

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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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