NEET Chemistry Hess's Law MCQ Question
On the basis of thermochemical equations (i), (ii) and (iii), find out which of the algebraic relationships given in options (a) to (d) is correct: (i) C(graphite) + O₂(g) → CO₂(g) ; ΔH = x kJ mol⁻¹ (ii) C(graphite) + 1/2O₂(g) → CO(g) ; ΔH = y kJ mol⁻¹ (iii) CO(g) + 1/2O₂(g) → CO₂(g) ; ΔH = z kJ mol⁻¹
z = x + y
x = y - z
x = y + z
y = 2z - x
Correct Answer
Detailed Explanation
According to Hess's Law, the total enthalpy change for a reaction is the sum of the enthalpy changes for the individual steps.
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