What Is the Enthalpy of Reaction D H Rxn for the Following

question 26

Multiple Choice

What is the enthalpy of reaction D H rxn for the following reaction?
SiO₂ (s) + 4 HF (g) SiF₄ (g) + 2 H₂ O ( ) D H rxn = ??
D H f (SiO₂ ) = - 910.9 kJ/mol D H f (HF) = - 273.0 kJ/mol D H f (SiF₄ ) = - 1614.9 kJ/mol D H f (H₂ O) = - 285.8 kJ/mol

• A) - 183.6 kJ/mol
• B) - 716.8 kJ/mol
• C) - 1002.6 kJ/mol
• D) - 3084.6 kJ/mol
• E) - 4189.4 kJ/mol

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