Question

Consider the following reactions : (i) H(aq) + OH- (aq) = H2O(l); AH = -x, kJ mol (i) H2(g) + + O2(9) = H,00); AH = -x, kJ mol-1 (iii) CO2(g) + H2(g) = CO(g) + H2O(); AH = -x, kJ mot 5 (iv) CH2(g) + 5 02(9) = 2CO(g) + H20(1): . ; AH = +X,kJ mot" Enthalpy of formation of H2O() is [AIPMT (Prelims)-2007) (1) +X, kJ mol-1 (2) +X, kJ mol-1 (3) +X3 kJ mot (4) +X, kJ mol-1
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Answer 1

enthalpy of formation of H2O from these equations is -X2 according to defination. I think there is problem in answer optiona.