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andriy [413]
3 years ago
13

Calculate the average molar bond enthalpy of the carbon-hydrogen bond in a ch4 molecule.

Chemistry
2 answers:
MatroZZZ [7]3 years ago
8 0

Answer:

415.825 kJ/mol.

Explanation:

Average enthalpy = \Delta H_f(CH_4)-4\Delta H_f(H)-\Delta H_f(C)

Now, \Delta H_f(CH_4)=-74.6 kJ/mol

         \Delta H_f(H)=218 kJ/mol

         \Delta H_f(C)=716.7 kJ/mol

( SOURCE INTERNET)

Putting all these values above.

We get,

Average enthalpy=-1663.3 kJ.

Therefore, averagemolar bond enthalpy= \dfrac{1663.3 }{4}=415.825\ kJ/mol.

Hence, this is the required solution.

balandron [24]3 years ago
7 0
<span>The average molar bond enthalpy of the carbon-hydrogen bond in a CH4 molecule is 416 KJ/mol. (+716.7 + (4 x 218) - (- 74.6) ) / 4 = + 1663.3 / 4 = 416</span>
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