Engineering Thermodynamics
Zeroth law of thermodynamics

Deals with reversibility and irreversibility of process
Deals with conversion of mass and energy
States that if two systems are both in equilibrium with a third system, they are in thermal equilibrium with each other
Deals with heat engines

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Engineering Thermodynamics
Carbonization of coal consists of

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

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