82Enthalpy-Cal

82Enthalpy-Cal - (4 moles x 45.9kJ/mole) + (5 moles x...

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ENTHALPY CALCULATIONS FROM DATA TABLE GCHEM I LAB CONCEPT PROBLEMS ENTHALPY REACTION H o Rx = H o f ( PRODUCTS ) - H o f ( REACTANTS ) Determine the Enthalpy Change ( H) for the following chemical reactions . Obtain standard ( H o f ) of formation from Appendix L “Thermodynamic Values”, Kotz and Treichel, page – A.31. 1) 4NH 3 (g) + 5O 2 (g) 4NO(g) + 6H 2 O(g ) ▲H o f (– 45.9 kJ/mole) (0.0 kJ/mole) (90.3kJ/mole) ( – 241.8kJ/mole) ∑▲H o f Products = (4 moles x 90.3kJ/mole) + (6 moles x – 241.8kJ/moles) = – 1089.6 kJ/mole ∑▲H o f Reactants =
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Unformatted text preview: (4 moles x 45.9kJ/mole) + (5 moles x 0.0kJ/mole) = 183.6 kJ/mole H o rx = ( 1089.6 kJ/mole) ( 183.6 kJ/mole) = 906 kJ/mole 2) 2H 2 S (g) + 3O 2 (g) 2SO 2 (g) + 2H 2 O (g) 3) CH 4 (g) + Cl 2 (g) CCl 4 (g) + HCl (g) 4) C 2 H 4 (g) + 3 O 2 (g) 2 CO 2 (g) + 2 H 2 0 (l) 5) 2 C 6 H 14 (l) + 13O 2 (g) 6CO 2 (g) + 14 H 2 O (l) 6) 4 NH 3 (g) + 5 O 2 (g) 4 NO (g) + 6 H 2 O (g) 7) Ca(OH) 2 (s) + CO 2 (g) CaCO 3 (s) + H 2 O (g) Jpechunf11/2003...
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82Enthalpy-Cal - (4 moles x 45.9kJ/mole) + (5 moles x...

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