Answer to Question #205199 in Chemistry for Ankush

Question #205199

Using a table of thermochemical data, calculate Enthalpy for the reaction.

CH4(g)+2O2(g)=CO2(g)+2H2O(g)


1
Expert's answer
2021-06-14T02:15:02-0400

Given, enthalpies of formation of CH4, CO2 and H2O are 74.8 kJmol−1, −393.5 kJmol−1, −286 kJmol−1 respectively.


ΔHo = ΔHfo(products) − ΔHfo(reactants)

​

= [ΔHo(CO2) + ΔHo(H2O)] − [ΔHo(CH4​)o + 2ΔHo(O2​)]


= [−393.5 + 2×(−286.2)] − [−74.8+2×0] = −890.7kJ


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