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Sigrid O'Kon

Feb 20, 2025

Calculate ΔH°rxn for the following: (Hess’s Law of Heat Summation)?

Calculate ΔH°rxn for the following:SiO2(s) + 4 HF(g) –> SiF4(g) + 2 H2O(l)in kJ.Please briefly explain for me. i think i have the basics down. so hopefully i will understand the explanation Thanks!
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SiO2(s) + 4 HF(g) –> SiF4(g) + 2 H2O(l)what you need are the values for ΔH formation of each compound. H formation SiO2 = -911 kJ/mole…..1 moleH formation HF = -268.6 kJ/mole…..4 molesH formation SiF4 = -1609.428 kJ/mole…..1 moleH formation H2O = -285.83 kJ/mole…..2 molesΔH°rxn = products – reactantsΔH°rxn = (-1609.428 + 2(-285.83)) – (-911 + 4(-268.6))ΔH°rxn = -2181.09 – (-1985.4) = -195.69kJ... Show More
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