Repeat Illustration 14.5-1 if 50% excess air is used. Illustration 14.5-1 Determine the maximum useful shaft work

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Repeat Illustration 14.5-1 if 50% excess air is used.

Illustration 14.5-1

Determine the maximum useful shaft work that can be obtained from natural gas that we will model as methane, which is available at 25°C and 1 bar. The methane is to be burned in air that contains nitrogen and oxygen in the mole ratio of 3.76 to 1. 

(a) Use the approximate availability equation.

(b) Use the exact availability equation. 

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