Using the data provided, calculate the multiple bond energy ( k J m o l - 1 ) of a C ≡ C bond in C 2 H 2 . That energy is (take the bond energy of a C - H bond as 350 k J m o l - 1 ). 2 C s + H 2 g → C 2 H 2 g Δ H = 225 k J m o l - 1 2 C ( s ) → 2 C ( g ) Δ H = 1410 k J m o l - 1 H 2 g → 2 H g Δ H = 330 k J m o l - 1

Question

Using the data provided, calculate the multiple bond energy ( k J m o l - 1 ) of a C ≡ C bond in C 2 H 2 . That energy is (take the bond energy of a C - H bond as 350 k J m o l - 1 ). 2 C s + H 2 g → C 2 H 2 g Δ H = 225 k J m o l - 1 2 C ( s ) → 2 C ( g ) Δ H = 1410 k J m o l - 1 H 2 g → 2 H g Δ H = 330 k J m o l - 1, 837, 1165, 815, 865

MARKS App · Accepted Answer

Let x be the bond energy of C ≡ C , it can be find out as follows 2 C ( s ) + H 2 ( g ) → C 2 H 2 ( g ) Δ H = Σ B . E . r e a c t a n t - B . E . p r o d u c t 1410 + 330 - x + 2 × 350 = 225 x = 815 k J m o l - 1

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