Relative Difference \u0394 HPart D \u0394 HPart B C \u0394 H Part D 100 5 BIBLIOGRAPHY Hess G

Relative difference δ hpart d δ hpart b c δ h part

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% Relative Difference=ΔHPart DΔHPart B+CΔHPart D×100%(5) BIBLIOGRAPHY Hess, G. H. “The Evolution of Heat in Multiple Proportions.” Pogg. Ann.1839, 47, 210. Leicester, H. M. “Germain Henri Hess and the Foundations of Thermochemistry.” J. Chem. Educ.1951, 28, 581. Davis, T. W. “A Common Misunderstanding of Hess’s Law.” J. Chem. Educ.1951, 28584. Postma, J. M.; Roberts, J. L.; Hollenberg, J. L. Chemistry in the Laboratory: Experiment 156thEd., W. H. Freeman and Company, New York, 2006. PRE-LAB QUESTION Given the following reaction enthalpies: P4(s)+6Cl2(g)! →!4PCl3(g)ΔHrxn=1225.6kJmolP4(s)+5O2(g)! →!P4O10(s)ΔHrxn=2967.3kJmolPCl3(g)+Cl2(g)! →!PCl5(g)ΔHrxn=84.2kJmolPCl3(g)+12O2(g)! →!POCl3(g)ΔHrxn=285.7kJmolcalculate the value of Hrxnfor: , , (g)Show your work.
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Experiment#11 – Enthalpy & Hess’s Law 11 – 6
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