Question

In an industrial process, propane is combusted in a furnace at 1000°C.  An inlet stream of propane enters at 100 mol/s and 25°C.  An air stream containing 20% excess oxygen enters the reactor at 300°C.  The propane reacts completely with oxygen to form water and carbon dioxide
by the following reaction:

C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O (l) âˆ†Hr0 = -2220 kJ/mol

Assuming no shaft work, calculate the heating requirement for the furnace using two different methods: (i) the heat of reaction method and (ii) the heat of formation method.  Is heat transferred to or from the furnace?

Relevant thermodynamic data:

Water (gas): âˆ†Hf = -241.83kJ/mol, âˆ†Hv = 40.656kJ/mol
Water (liquid): âˆ†Hf = -285.84kJ/mol, CP = 75.4J/mol/K
Propane (gas): âˆ†Hf  = -103.8kJ/mol
Carbon dioxide (gas): âˆ†Hf = -393.5kJ/mol

Summary

The question belongs to Chemical Engineering and the question is about heat transfer in a furnace where propane is used as the fuel with air being pumped with 25% extra oxygen. The question is to find the heat reaction method, heat of formation method and whether heat is transferred to or from the furnace.

Note: The answers are in handwritten format

• Rasha

this is a very good website

• maani

I have 50 questions for the same test your page is showing only 28

• joeanne

• joeanne

hi can anyone help or guide me to my assignments. thanks

• Monik

• Cristina

This solution is perfect ...thanks

• Janete

Hello Allison,I love the 2nd image that you did! I also, had never heard of SumoPaint, is something that I will have to exolpre a bit! I understand completely the 52 (or so) youtube videos that you probably watched. Sometimes they have what you want, sometimes they don't! However, it is always satisfying when you are able to produce something that you have taught yourself. Great job!Debra 0 likes

• Sandeep

Perfect bank of solution.

• Oxana

great !

• Paul Brandon-Fritzius

thanks for the quick response. the solution looks good. :)

• tina Johnson

thnx for the answer. it was perfect. just the way i wanted it.

• Giuseppe

works fine.