Using the data provided, calculate the multiple bond energy (kJ$$ $$mol-1) of a C ≡ C bond in $$C2H2$$.Given that the heat of formation of $$C2H2$$ $$=$$ $$225$$ kJ $$mol-1$$.(take$$ the bond energy of a C $$-$$ H bond as $$350$$ kJ $$mol-1)

Question

Using the data provided, calculate the multiple bond energy (kJ$$ $$mol-1) of a C ≡ C bond in $$C2H2$$.Given that the heat of formation of $$C2H2$$ $$=$$ $$225$$ kJ $$mol-1$$.(take$$ the bond energy of a C $$-$$ H bond as $$350$$ kJ $$mol-1)

Infinity Learn · Accepted Answer

$$i)$$ $$2C(s)+H2(g)$$⟶H−C≡C−$$H(g)$$                    Δ$$H=225kJmol$$−$$1ii)$$ $$2C(s)$$⟶$$2C(g)$$                                          Δ$$H=1410kJmol$$−$$1iii)$$  (iii) $$H2(g)$$⟶$$2H(g)$$                          Δ$$H=330kJmol$$−$$1$$ From equation (i):$$225=$$[$$1410+1$$×$$330$$]−$$2$$×$$350+1$$×eC≡$$C225=$$[$$1410+330$$]−$$700+eC$$≡$$C225=1740$$−$$700$$−eC≡CEC≡$$C=1040$$−$$225=815kJmol$$−$$1BEC$$≡$$C=815kJmol$$−$$1$$

Using the data provided, calculate the multiple bond energy (kJ mol-1) of a C ≡ C bond in C2H2.Given that the heat of formation of C2H2 = 225 kJ mol-1.(take the bond energy of a C - H bond as 350 kJ mol-1)

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