Question

Consider the following reaction:
2CH3OH(g)→2CH4(g)+O2(g)ΔH=+252.8kJ
Calculate the amount of heat transferred when 27.0g of CH3OH(g) is decomposed by this reaction at constant pressure.

If someone could help me with the steps I can figure it out on my own, thank you so much

Answer 1

the delta H in your reaction is defined by the stoichiometry of the reaction. In this case 2 moles of CH3OH will decompose absorbing 252.8kJ.
Then you have to calculate how many moles of CH3OH you have in your sample of 27.0g and multiply that number of moles by the conversion factor 252.8kJ/2mole

Answer 2

Thank you!

Answer 3

I got the right answer! :)