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In which of the following reactions is ΔE closest in value to ΔH?

a) HNO3(aq) + Na2(CO3)(aq) = NaNO3(aq) + H2O(l) + CO2(g)

b) HCl(aq) + NaOH(aq) = H2O(l) + NaCl(aq)

c) KClO3(s) = KCl(s) + (3/2)O2(g)

d) Na(s) + H2O(l) = NaOH(aq) + (1/2)H2(g)

I'm thinking it's C but I'm not sure, thanks!

1 Answer

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  • Rais
    Lv 6
    6 years ago

    b) HCl(aq) + NaOH(aq) = H2O(l) + NaCl(aq)

    As ΔH = ΔE + PΔV

    In this reaction apparently no change in Volume.

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