Homework answers / question archive / 1 Determine the enthalpy for this reaction: MgCl2(s) + 2NAOH(aq)------> Mg(OH)2(s)+2NACl(aq) Express your answer in kilojoules per mole to four significant figures

1 Determine the enthalpy for this reaction: MgCl2(s) + 2NAOH(aq)------> Mg(OH)2(s)+2NACl(aq) Express your answer in kilojoules per mole to four significant figures

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1 Determine the enthalpy for this reaction:
MgCl2(s) + 2NAOH(aq)------> Mg(OH)2(s)+2NACl(aq)
Express your answer in kilojoules per mole to four significant figures.

The following table lists some enthalpy of formation values for selected substances.
Substance ----------delta Hf (kJ/mol)

NAOH (aq)------ (-469.1)

MgCl2 (s)-------- (-641.8)

NaCl (aq)----- (-407.3)

Mg(OH)2 (s) ----- (-924.5)

H2O (l) --------- (-285.8)

2. Consider the reaction:

Mg(OH)2 (s) ------> MgO (s) + H2O (l) with enthalpy of rxn delta Hrxn =37.50 kJ/mol.

What is the enthalpy of formation of MgO(s)?

Express your answer in kilojoules per mole to four significant figures.