Consider the following reaction involving certain gas-phase compounds X, Y, and Z: X + 2Y  →  Z                        ∆H°rxn = –788 kJ If the total bond enthalpies of X and Y are 1724 kJ/mol and 805 kJ/mol, respectively, then what is the total bond enthalpy of compound Z?   A.  4122 kJ/mol   B.  2546 kJ/mol   C.  3317 kJ/mol   D.  4446 kJ/mol   E.  1741 kJ/mol

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Chapter6: Thermochemistry
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Problem 110AE: Given the following data: NO2(g) NO(g) + O(g)H = 233 kJ 2O3(g) 3O2(g)H = 427 kJ NO(g) + O3(g) ...
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Consider the following reaction involving certain gas-phase compounds X, Y, and Z:

X + 2Y  →  Z                        ∆H°rxn = –788 kJ

If the total bond enthalpies of X and Y are 1724 kJ/mol and 805 kJ/mol, respectively, then what is the total bond enthalpy of compound Z?

  •  
    A. 

    4122 kJ/mol

  •  
    B. 

    2546 kJ/mol

  •  
    C. 

    3317 kJ/mol

  •  
    D. 

    4446 kJ/mol

  •  
    E. 

    1741 kJ/mol

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