Engineering Thermodynamics
Zeroth law of thermodynamics

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

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Engineering Thermodynamics
The universal gas constant (or molar constant) of a gas is the product of

Molecular mass of the gas and the specific heat at constant pressure
Molecular mass of the gas and the gas constant
Molecular mass of the gas and the specific heat at constant volume
Atomic mass of the gas and the gas constant

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Engineering Thermodynamics
Carbonization of coal consists of

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

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