Engineering Thermodynamics
When the gas is heated at constant pressure, the heat supplied

Increases the temperature of the gas
Increases the internal energy of the gas
Both (B) and (C)
Does some external work during expansion

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Engineering Thermodynamics
Carbonization of coal consists of

None of these
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

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