The products of combustion of an unknown hydrocarbon CxHy have the following composition as measured by an Orsat apparatus: - CO2= 8.0%, CO = 0.9% O2 = 8.8% and N2 = 82.3% - Mumbai university > MECH > SEM 3 > THERMO

Marks: 8M

Year: May 2014

Solution:

1. Composition of the fuel.

   From the given Orsat analysis the combustion equation is written as follows:

   $aC +bH +cO_2+ (\frac{79}{21})cN_2 → 8CO_2 +0.9CO + 8.8O_2+ x H_2O +82.3N_2$

   Now, Carbon balance: $a = 8 + 0.9; \ \ \ a = 8.9$

   Nitrogen balance:

   $(79/21)c = 82.3 ; \ …