Engineering Thermodynamics
To convert volumetric analysis to gravimetric analysis, the relative volume of each constituent of the flue gases is

Divided by its molecular weight
Multiplied by its density
Multiplied by its specific weight
Multiplied by its molecular weight

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Engineering Thermodynamics
Work-done during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and γ = Ratio of specific heats)

[m R T1/(γ - 1)][1 - (p2, v2 /p1 v1)]
All of these
[m R (T1 - T2)] /(γ - 1)
(p1 v1 - p2, v2)/(γ - 1)

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