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 →

Question

Using the data provided, calculate the multiple bond energy $(k J m o l^{- 1})$ of a $C \equiv C$ bond in $C_{2} H_{2}$ . That energy is (take the bond energy of a $C - H$ bond as $350 k J$ $m o l^{- 1}$ ).
$2 C (s) + H_{2} (g) \to C_{2} H_{2} (g) Δ H = 225$ $k J m o l^{- 1}$
$2 C (s) \to 2 C (g) Δ H = 1410$ $k J m o l^{- 1}$
$H_{2} (g) \to 2 H (g) Δ H = 330$ $k J m o l^{- 1}$

TestHub · 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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