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Chemistry LibreTexts

Enthalpy 1 (Worksheets)

  • Page ID
    11088
  • Name: ______________________________

    Section: _____________________________

    Student ID#:__________________________

    Work in groups on these problems. You should try to answer the questions without referring to your textbook. If you get stuck, try asking another group for help.

    Q1

    Using bond energies, calculate the \(\Delta H_{rxn}\) for each of the following:

    1. \(2H_{2\,(g)} + O_{2\,(g)} \rightarrow 2H_2O_{(l)}\)
    2. \(CH_{4\,(g)} + 2O_{2\,(g)} \rightarrow CO_{2\,(g)} + 2H_2O_{(l)}\)


    Bond type
    Bond Energy, kJ/mol
    Bond type
    Bond Energy, kJ/mol
    \(H - H\)
    436
    \(C - O\)
    358
    \(O - O\)
    146
    \(C = O\)
    799
    \(O = O\)
    498
    \(C - H\)
    413
    \(O - H\)
    463