Engineering Thermodynamics
If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as

Adiabatic expansion
Hyperbolic expansion
Free expansion
Throttling

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Engineering Thermodynamics
The mass of flue gas per kg of fuel is the ratio of the

Mass of oxygen in 1 kg of flue gas to the mass of oxygen in 1 kg of fuel
Mass of carbon in 1 kg of flue gas to the mass of carbon in 1 kg of fuel
Mass of oxygen in 1 kg of fuel to the mass of oxygen in 1 kg of flue gas
Mass of carbon in 1 kg of fuel to the mass of carbon in 1 kg of flue gas

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