Example 9:

A mixture of η₀ , ν₁ moles of A₁ η₀, ν₂ moles of A₂ at temp T and pressure p occupies a volume V₀, when the reaction is ;

has come equilibrium at the same T and p, the volume is V_e , show that

Solution:

Example 10:

A gasoline engine delivers 150 kW. The fuel used is C₈H₁₈(l) and it enters the engine at 25°C. 150 % theoretical air is used and it enters at 45°C. The product of combustion leave the engine at 750 K, and the heat transfer from engines is 205 kW. Determine the fuel consumption per hour if complete combustion is achieved.

Solution:

The stoichiometric equation is given as;

Energy input from engine W_cv=150kW
Q_cv=-205kW
Let n kg mol of fuel be consumed per second,
By first law,

 

Therefore, Fuel consumption rate=η X molecular wt.
= 0.346 X 114
= 39.4 kg/hr