Chemistry

posted by Chem Help

i tried to do like dis plz chk is it rite or wrong.

[2(4(327) + 495 ]- [ 2(4(327) + 523 ]
= -28

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

1. Chem Help

i got it .. no worries .. answer was -551 thnks anywyz .. DR BOB FOR this question .. i asked so many times.. so really SORRRY DR BOB >. to bother u lot..

2. DrBob222

-551 kJ is what I obtained also.
S-F = 327*4 = 1308
2mols of that so 2*1308 = 2616
+ O=O = 495.
2616+495 = 3111 for reactants.
Products:
4 S-F bonds @ 327 each = 1308
+ 1 S=O @ 523 = 1831 for each molecule.
There are two of them so 2*1831= 3662.
Then reactants - products = 3111-3662 = -551 kJ.

3. Kennedy

Maybe chemistry is your profession cuz dude, you can't spell worth s***

Similar Questions

1. Chemistry

The bond energy of the O2 molecule is 495. a) calculate the minimum frequency and max wavelength of light required to break this bond. b) how many photons of this wavelength would it take in order to break open the bonds of all the …
2. Chem Urgent Help

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 ?
3. Urgent Chem help plz

is answer +103 KJ.. plz chk 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 ?
4. Chem

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 + …
5. chem

stilll didn't get it .. .. can u plz explain in detail ... how did u get the answer.. plz plz plz plz plzp l zp thnks 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 …
6. CHem help pkz

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 + …
7. help plz

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 + …
8. college chemistry

CH4 + 2 Cl2--> CH2Cl2 + 2HCl Cl-Cl bond energy: 242 kj/mole 1. Calculate the amount of energy (Joules) needed to break a single Cl-Cl bond. 2. Calculate the longest wavelength of light (meters)that can supply the energy per photon …
9. chemistry

The X-X bond energy in the hypothetical gas, X2 is 153 kJ/mol. a. How much energy, in joules, is required to break the bond in a single X-X molecule?
10. chemistry... HELP !!!!!!!

The average bond enthalpy for C__H is 413 kJ/mol. In other words, 413 kJ of energy is required to break a mole of CH into atoms: CH (g) ----> C(g) + H(g) delta H= 413 kJ Using this information, and enthalpy of C6H6=5535kJ, calculate …

More Similar Questions