Question

If x1, x₂ and x3 are enthalpies of H–H, O=O and O–H bonds
repectively, and x4 is the enthalpy of vaporisation of water,
estimate the standard enthalpy of combustion of hydrogen:
(a) x₁ + x₂/2 - 2x₃ + x₄ (b) x₁ + x₂/2 - 2x₃ - x₄
(c) x₁ + x₂/2 - x₃ + x₄ (d) 2x₃ - x₁ - x₂/2 - x₄

Answer 1

$\huge\bold\red{Answer:-}$

(a) x₁ + x₂/2 - 2x₃ + x₄

Answer 2

$\huge{\underline{\mathbb{\red{Answer}}}}$

(a) x₁ + x₂/2 - 2x₃ + x₄

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$\huge{\underline{\underline{\mathfrak{Thank you}}}}$