Engineering Thermodynamics
The value of the product of molecular weight and the gas characteristic constant for all the gases in S.I. units is

29.27 J/kmol °K
735 J/kmol °K
848 J/kmol °K
83.14 J/kmol °K

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Engineering Thermodynamics
Coke is produced

From the finely ground coal by moulding under pressure with or without a binding material
By heating wood with a limited supply of air to a temperature not less than 280°C
When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel
When coal is first dried and then crushed to a fine powder by pulverizing machine

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