Calculate the ΔH°rxn for the following reaction. (ΔH°f [SiO2(s) ] = −910.9 kJ/mol; ΔH°f [SiCl4(g) ] = −657.0 kJ/mol; ΔH°f [HCl(g) ] = −92.3 kJ/mol; ΔH°f [H2O(g) ] = −241.8 kJ/mol)
SiO2(s) + 4HCl(g) → SiCl4(g) + 2H2O(g)
A) −139.5 kJ
B) −137.4 kJ
C) −104.4 kJ
D) 104.4 kJ
E) 139.5 kJ
Correct Answer:
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