(e) The mean bond enthalpy for chlorine is +242 kJ mol·' and that for fluorine is +158 kJ mol·'. The enthalpy of formation of CIF (g) is 56 kJ mol (i) Write down the formation reaction of CIF (g) and calculate a value for the bond enthalpy of the Cl-F bond. (ii) Calculate the enthalpy of formation of gaseous Chlorine Trifluoride, CIF3 (g), using the bond enthalpy value you obtained in part (i). (iii) The bond enthalpy of CIF3 calculated in part (ii) is likely to be different than that determined from experiment, Explain.

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Chapter1: Chemical Foundations
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(e)
The mean bond enthalpy for chlorine is +242 kJ mol-l and that for fluorine is +158 kJ mol·'. The
enthalpy of formation of CIF (g) is 56 kJ mol-
(i)
Write down the formation reaction of CIF (g) and calculate a value for the bond enthalpy of
the Cl-F bond.
(ii)
Calculate the enthalpy of formation of gaseous
Chlorine Trifluoride, CIF3 (g), using the
bond enthalpy value you obtained in part (i).
(iii)
The bond enthalpy of CIF3 calculated in part (ii) is likely to be different than that determined
from experiment. Explain.
Transcribed Image Text:(e) The mean bond enthalpy for chlorine is +242 kJ mol-l and that for fluorine is +158 kJ mol·'. The enthalpy of formation of CIF (g) is 56 kJ mol- (i) Write down the formation reaction of CIF (g) and calculate a value for the bond enthalpy of the Cl-F bond. (ii) Calculate the enthalpy of formation of gaseous Chlorine Trifluoride, CIF3 (g), using the bond enthalpy value you obtained in part (i). (iii) The bond enthalpy of CIF3 calculated in part (ii) is likely to be different than that determined from experiment. Explain.
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