Engineering Thermodynamics
The behavior of a perfect gas, undergoing any change in the variables which control physical properties, is governed by

Boyle's law
Gay-Lussac law
Charles' law
All of the listed here

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Engineering Thermodynamics
Carbonization of coal consists of

Heating the wood with a limited supply of air to temperature not less than 280°C
Moulding the finely ground coal under pressure with or without a binding material
Drying and crushing the coal to a fine powder
None of these

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