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The enthalpy change under standard conditions for which of the reactions below would be equal to...

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Chemistry

The enthalpy change under standard conditions for which of thereactions below would be equal to the ∆H°f of NaOH(s)? (A) Na(s) +H2O(l)  NaOH(s) + 1/2 H2(g) (B) Na(s) + 1/2 O2(g) + 1/2 H2(g) NaOH(s) (C) Na(s) + 1/2 H2O2(l)  NaOH(s) (D) Na+(aq) + OH–(aq) NaOH(s) please explain why you chose that answer and why the otheranswers are wrong. If it has to do with them being in theirstandard states, how do I know what the standard states of theelements are.

Answer & Explanation Solved by verified expert
4.4 Ratings (724 Votes)
Start from the basic Standard state of the substance is defined at 25 deg C and 1atm pressure So at these conditions if the substance exists in say Solid state then its standard state is Solid So we know all of the metals except Mercury are solid    See Answer
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