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OfflinePosted on : 02:32:22 PM on July 27, 2009
Estimate the average S-F bond energy in SF6
Estimate the average S-F bond energy in SF6
The standard heat of formation values are :
SF6(g) ® 1100 kJ/mol
S(g) ® 275 kJ/mol
F(g) ® 80 kJ/mol
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Answers :
  pankaj | Posted on : 02:34:05 PM on July 27, 2009 The required equation is: SF_6 (g) \to S(g) + 6F(g),\Delta H.......(1) The bond energy is \Delta H/6. S(s) + 3F_2 (g) \to SF_6 (g),\Delta H_1 =-1100.......(2) (I think it should be negative) S(s) \to S(g),\Delta H_2 = 275.......(3) {1 \over 2}F_2 (s) \to F(g),\Delta H_3 = 80.......(4) Now, you can find \Delta H/6 from appropriate Mathematics. |
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