MadSci Network: Engineering
Query:

Re: how do i calculate the products from complete combustion of car petrol

Date: Tue Jan 3 10:03:37 2006
Posted By: Nari Soundarrajan, Grad student, Energy Engineering, Penn State university
Area of science: Engineering
ID: 1133273792.Eg
Message:

Hello Aiysha

I am sorry but we don't solve homework problems on principle. That having been said, in general, if you are trying to convert from moles to kgs, you need to look up the atomic weight of each element involved and then each mole corresponds to atomic mass in grams (*note grams).

E.g. 1 mol of CO2 is (1)*12g + (2)*18g = 44 g = 44/1000 kg = 0.044 kg. Where 1 mole of carbon is weighs 12 g, and 1 mole of oxygen is 18 g.

I hope this helps. What you need to do is find out the molecular formula for petrol (hexane? maybe?), then you can find out the molecular weight for petrol. Using that find out how many moles are present in 10 kg of petrol. Then you can write a balanced chemical equation showing "petrol + oxygen = products". Use that to figure out how many moles of products are formed and then convert that back to kgs.

You can use the website webelements.com for the atomic mass of all elements.
Good luck
- Nari Soundarrajan, MadSci


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