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प्रदान किए गए आंकड़ों का उपयोग करते हुए,...

प्रदान किए गए आंकड़ों का उपयोग करते हुए, `C_2H_2` में `C -= C` बंध की बहु बंध ऊर्जा की `(KJ mol^(-1))` गणना कीजिए। वह ऊर्जा है: ( C - H बंध की बंध ऊर्जा `350 kJ mol^(-1)` के रूप में लीजिए )
`2C(s) to 2C(g,) DeltaH = 1410 kJ mol^(-1)`
`H_2(g) to 2H(g) , DeltaH = 330 kJ mol^(-1)`
`2C(s) + H_2(q) to C_2H_2 , DeltaH = 225 kJ mol^(-1)`

A

1165

B

837

C

865

D

815

Text Solution

Verified by Experts

The correct Answer is:
D
(i) `2C(s) + H_2(g) to H - C -= C - H (g)`
`DeltaH = 225 kJ mol^(-1)`
(ii) `2C(s) to 2C (g)`
`DeltaH_1 = 1410 kJ mol^(-1)`
(iii) `H_2(g) to 2H(g)`
`DeltaH_2 = 330 kJ mol^(-1)`
समीकरण (i) से
`225 = (DeltaH_1 + DeltaH_2) - [2DeltaH_(C-H) + DeltaH_(C-=C)]`
`225 = [1410 + 330] + (2 xx 350) + DeltaH_(C-=C_]`
`225 = 1040 - DeltaH_(C-=C)`
`DeltaH_(C-=C) = 1040 - 225 = 815 kJ mol^(-1)`
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Using the data provided, calculate the multiple bond energy ( kJ "mol"^(-1) ) of a C equiv C bond in C_(2)H_(2) .That energy is (take the bond enrgy of a C-H bond as 350 kJ "mol"^(-1) ): 2C(s) + H_(2)(g) to C_(2)H_(2)(g), DeltaH = 225 kJ "mol"^(-1) 2C(s) to 2C(g), DeltaH = 1410 kJ "mol"^(-1) H_(2)(g) to 2H(g), DeltaH = 330 kJ "mol"^(-1)