Chemical Forums

Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: mikeloya on March 30, 2006, 04:58:47 PM

Title: energy enthalpy trouble
Post by: mikeloya on March 30, 2006, 04:58:47 PM

Ok the question I am trying to solve is:

C3H8 + O2 -> CO2 + H2O  delta H = +654 kJ

How much energy is generated if 5.4 g of C3H8 are reacted?

Ok so what I have done is converted the 5.4g into mols of C3H8, now can i multiply it by the deltah H to give me the answer?

Title: Re:energy enthalpy trouble
Post by: Albert on March 31, 2006, 07:09:12 AM

Yes, exactly.

Title: Re: energy enthalpy trouble
Post by: engware on April 19, 2006, 04:13:01 PM

Hi there:

But the chemical reaction equation, as written, is not balance -- LHS <> RHS i terms of C, H2  and O2 ...

Thanks,

Gordan

Title: Re: energy enthalpy trouble
Post by: Donaldson Tan on May 26, 2006, 11:32:47 PM

C₃H₈ + 5 O₂ => 3CO₂ + 4H₂O