82Enthalpy-Cal-Ans

# 82Enthalpy-Cal-Ans - o rx =(– 1089.6 kJ/mole –(–...

This preview shows pages 1–2. Sign up to view the full content.

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 ) from Appendix L “Selected Thermodynamic Values”, Kotz and Treichel, p 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 = (4 moles x – 45.9kJ/mole) + (5 moles x 0.0kJ/mole) = – 183.6 kJ/mole ▲H

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 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) – 1,036 kJ/mole 4 s/f 3) ____ CH 4 (g) + ____ Cl 2 (g) ____ CCl 4 (g) + ____ HCl (g) – 434 kJ/mole 3 s/f 4) C 2 H 4 (g) + 3 O 2 (g) 2 CO 2 (g) + 2 H 2 0 (l) – 1,411 kJ/mole 4 s/f 5) 2 C 6 H 6 (l) + 15 O 2 (g) 12 CO 2 (g) + 6 H 2 O (l) – 654 kJ/mole 3 s/f 6) 4NH 3 (g) + 5 O 2 (g) 4NO (g) + 6 H 2 O (g) – 906 kJ/mole 3 s/f 7) Ca(OH) 2 (s) + CO 2 (g) CaCO 3 (s) + H 2 O (g) – 69.13 kJ/mole 4 s/f jpechunf11/2009...
View Full Document

## This note was uploaded on 07/28/2011 for the course CHM 2045 taught by Professor Eng during the Spring '10 term at UNF.

### Page1 / 2

82Enthalpy-Cal-Ans - o rx =(– 1089.6 kJ/mole –(–...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online