Assigned problems _3 answers - Chemistry 2080 Spring 2011...

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Chemistry 2080 Spring 2011 Problem Set #3 - due date: Friday February 18th at 2 pm Name:________________ Lab TA Name:__________________ Lab Day/Time:______________________ 1) Given the following data, calculate the value of Δ f (the standard enthalpy of formation) of H 2 SO 4 (aq) in kJ/mol. Assume all temperatures are 25°C. (a) SO 3 (g) + H 2 O (l) –––––––––> H 2 SO 4 (aq) Δ = - 227.8 kJ (b) S (s) + O 2 (g) ––––––––––> SO 2 (g) Δ = - 296.8 kJ (c) SO 2 (g) + 1 /2 O 2 (g) –––––––> SO 3 (g) Δ = - 98.9 kJ For H 2 O (l) Δ f = - 285.8 kJ/mol __________________________________________________________________________ The standard enthalpy of formation of liquid water is given as - 285.8 kJ/mol, so this is the standard enthalpy of reaction for the following chemical equation: (d) H 2 (g) + 1 /2 O 2 (g) ––––––––> H 2 O (l) Δ = - 285.8 kJ/mol We are asked to calculate the standard enthalpy of formation of H
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This note was uploaded on 03/28/2011 for the course CHEM 2080 taught by Professor Davis,f during the Spring '07 term at Cornell University (Engineering School).

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Assigned problems _3 answers - Chemistry 2080 Spring 2011...

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