Question

Plz explain in detail....

i tried to search on internet but i am confused with co-efficents.. how to set up the equaiton .. plz help me ???



Bond enthalpy is the energy required to break a mole of a certain type of bond.

O=O = 495 kj/mol
S-F = 327 kj/mol
S=O = 523 kj/mol


Use average bond enthalpies to estimate the enthalpy delta H (rxn) of the following reaction:

2SF4 + O2 ---- 2OSF4

Express your answer numerically in kilojoules.

Thanks in Advance

Answer 1

SF4 we break 4 SF bonds. That times 2.
O2 we break 1 O2 bond. That times 1.

OSF4. We form 4 S-F bonds and 1 S=O bond. That times 2.
Then BE reactants - BE products = delta H rxn.

Answer 2

can u plz figure out the answer for me .. its very urgent.. thnks ..
i still didn't get it

thnks a lot Dr bob

Answer 3

Just plug in the numbers and punch your calculator. The idea here is to show you how to do it, not to do it for you.