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chemistry

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Two new metallic elements have been discovered, Cimium (Ci) and Sadowium (Sd). Both the pure elements and their solutions form simple cubic lattices. The bond strengths of the Ci-Ci and Sd-Sd bonds are known, but not the Ci-Sd bond.
Bond Bond Energy (kJ/mole)
Ci-Ci -245
Sd-Sd -191
J-R ??

Mixing a solution of 40% cimium and 60% sadowium is an endothermic process. According to your calorimeter, the solution draws 44.6 kJ/mol of heat when mixed. What is the strength of the Ci-Sd bond? Please give your answer in kJ/mol.

  • chemistry -

    Any ideas??

  • chemistry -

    2.296

  • chemistry -

    Ne grows in the haus

  • chemistry -

    Anonymous, your solution is wrong. Could you give me a hint of your steps?

  • chemistry -

    whats the answer

  • chemistry -

    Use the equation:
    delta(w)= 2w(A-B)-w(A-A)-w(B-B)

    delta(w)= 44.6
    (A-A)Ci-Ci=-245
    (B-B)Sd-Sd=-191

    44.6 = 2w(A-B)-(-245)-(-191)
    w(A-B) = [44.6 - 245 - 191]/2
    w(A-B)= -195.7

    -195.7

  • chemistry -

    its -195.7

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