The enthalpy change under standard conditions for which of the reactions below w

Question

The enthalpy change under standard conditions for which of the reactions below would be equal to the deltaHdegree_f of NaOH(s)? Na(s) + H_2O(l)rightarrow NaOH(s)+1/2H_2(g) Na(s) + 1/2H_2O_2(l) + 1/2(l) rightarrow NaOH(s) Na(s) + 1/2 H_2O(l) rightarrow NaOH(s) Na^+ (aq) + OH^- (aq) rightarrow NaOH(s) Which of these reactions has deltaSdegree > 0? S_s(l) rightarrow S_s(s, monoclinic) H_2(g)+ O_2(g) rightarow H_2O_;2(aq) H_2(G)+2 Ag^+ (aq) rightarrow 2 H^+(aq) + 2 Ag(s) PCI_5(g) rightarrow PCI_3(g)+CI_2(g) For the reaction 5 O_2(g) + 4 NH_3(g)rightarrow NO(g) + 6H_2O(g) if NH_3 is being consumed at a rate of0.50 Mmiddots^-1 at what rate is H_2O being formed?

Explanation / Answer

For Hf, we need to choose all the elemental states

that is

Na(s) and O2(g) and H2(g)

the baallance

Na(s) + 1/2O2(g) + 1/2H2(g) = NaOH(aq)

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