Data: SO2(g)+ 1/2O2(gas)forms SO3(g)Delta H = -99.1 kJ.

Question

Given the above data, calculate the enthalpy change when 89.6 g of SO2 is converted to SO3.
Is this a grams to moles conversion or what? I can't find any examples of this type of calculation.

Answer 1

I think the answer to your question is yes although I usually don't do them exactly that way.
I rearrange the question something like this.
Calculate enthalpy change when 89.6 g SO2 is converted to SO3 given that the reaction as written releases 99.1 kJ for 64.0 g SO2.
Then -99.1 kJ x (89.6/64.0) = -?? kJ.