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

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

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Heat Transfer
In a shell and tube heat exchanger,

The relationship is not generalised
There is no relationship between temperature drop and resistance
The temperature drop is inversely proportional to the resistance across which the drop occurs
The temperature drops in the two fluids and the wall are proportional to individual resistances

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