Part A What is Hrn for the fol lowing chemical reaction? H2 0(1) + CC14 (1) COC1

Question

Part A What is Hrn for the fol lowing chemical reaction? H2 0(1) + CC14 (1) COC12 (g) + 2HCl(g) H) to calculate the enthalpy of the given reaction. Standard Heat of Elementl CompoundForation (kJ/mol) Standard Heat of Formation (kJ/mol) ormation (kJ/mol) Elementl Compound 218 N(g) 02(g) O(g) HCl(g) CoC2 (g) HNOs (aq) H(g) 473 CCl4 (1) H20(1) C(g) C(s) -139.5 -285.8 71 249 92.30kJ 218.8kJ 206.6 Express the standard enthalpy of reaction to three significant figures and include the appropriate units ValueUnits Submit Hints My Answers Give Up Review Part

Explanation / Answer

: You are going to use Hess's Law : Hproducts-Hreactants=Hrxn

[(COCl2 + 2HCl)] - [(H2O + CCl4)]

[-218.8+ 2(-92.30)]-[ -285.8 + -139.5] = 21.9 kJ

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