Part A Use standard enthalpies of formation to calculate AHo for the following r

Question

Part A Use standard enthalpies of formation to calculate AHo for the following reaction. 2NaHCOs(s)- Nag0(s) +2C02(9)+H20g) Express your answer using four significant figures. k.J Submit My Answers Give Up Part B Use standard enthalpies of formation to calculate AH for the following reaction. Mg(OH)2 (s) MgO(s) + H2O(g) Express your answer using three significant figures. k.J Submit My Answers Give Up Part C Use standard enthalpies of formation to calculate Hxa for the following reaction. Ca(OH)2(s)+Ca0(s) + H2O(g) Express your answer using three significant figures. k.J Submit My Answers Give UR

Explanation / Answer

A.

HRXN = Hproducts -HReactants

HRXN = NA2O + 2CO2 + H2O - (2NaHCO3)

HRXN = -414.2 + 2*-393.5 + -241.8 - (2*-950.8)

HRXN = 458.6kJ/mol

B)

HRXN = Hproducts -HReactants

HRXN = (MgO H2O) - (Mg(OH)2)

HRXN = (-601.6 + -241.8) - (-924.5)

HRXN = 81.1 kJ/mol

C)

HRXN = Hproducts -HReactants

HRXN = CaO + H2O - (Ca(OH)2)

HRXN = -634.9 + -241.8 - -985.2

HRXN = 108.5 kJ

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