Heat Transfer
One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to

Data insufficient, can
To superheat the steam
Heat the water from 0°C to 100°C
Evaporate the water

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Heat Transfer
In regenerative air preheater (as practised in heating of coke ovens), the heat is transferred

Through a metallic wall
By direct contact of hot flue gas with air
By heating an intermediate material (like chequor bricks) and then heating the air from this hot material
None of these

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