Engineering Thermodynamics
Universal gas constant is defined as equal to product of the molecular weight of the gas and

Gas constant
Ratio of two specific heats
Specific heat at constant pressure
Specific heat at constant volume

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Engineering Thermodynamics
Carbonization of coal consists of

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

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