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Thermodynamics question

2007 · Q91
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Thermodynamics question

2007 · Q91

NEETChemistryThermodynamicsMCQ+4 / −1
Consider the following reactions :
(i) H+(aq) + OH−-−(aq) = H2O(l),  Δ\DeltaΔH = −-− X1 kJ mol−-−1
(ii) H2(g) + 1/2O2(g) = H2O(l),   Δ\DeltaΔH = −-− X2 kJ mol−-−1
(iii) CO2(g) + H2(g) = CO(g) + H2O(l),  Δ\DeltaΔH = −-− X3 kJ mol−-−1
(iv) C2H2(g) + 5/2O2(g) = 2CO2(g) + H2O(l),    Δ\DeltaΔH = +X4 kJ mol−-−1

Enthalpy of formation of H2O(l) is
  1. A
    +X3 kJ mol−-−1
  2. B
    −-−X4 kJ mol−-−1
  3. C
    +X1 kJ mol−-−1
  4. D
    −-−X2 kJ mol−-−1
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