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CGP EDU Academic Team
Published on: August 14, 2026
If x 1 , x 2 and x 3 are enthalpies of H–H, O=O and O–H bonds respectively, and x 4 is the enthalpy of vaporisation of water, estimate the standard enthalpy of combustion of hydrogen.
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
H 2 (g) + 
O 2 (g) ⎯→ H 2 O (l) ; Δ H comb H
Δ H comb = Δ H H — H + 
Δ H O = O – 2 Δ H O — H – Δ H vap = 
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