Engineering Thermodynamics
The mass of excess air supplied is equal to

(23/100) × Mass of excess oxygen
(100/23) × Mass of excess oxygen
(23/100) × Mass of excess carbon
(100/23) × Mass of excess carbon

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Engineering Thermodynamics
Which of the following statement is correct according to Clausis statement of second law of thermodynamics?

None of these
It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.
It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature.
It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature by using refrigeration cycle.

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