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Posted by on Tuesday, March 22, 2011 at 12:04am.

how much heat is required to completely vapporize 2.3 grams of ice starting at -50 degrees Celsius? (the specific heat of ice is 2.0 J/g.C; the specific heat of water is 4.184 J/g.C; the heat of fusion is 333 J/g; and the heat of vaporization is 22601 J/g)

  • chemistry - , Tuesday, March 22, 2011 at 12:31am

    q1 = heat to move solid ice from -50 C to zero C.
    q1 = mass ice x specific heat ice x (Tfinal-Tinitial).

    q2 = heat to melt ice at zero C to liquid water at zero C.
    q2 = mass ice x heat fusion.

    q3 = heat to move liquid water from zero C to 100 C
    q3 = mass water x specific heat water x (Tfinal-Tinitial)

    q4 = heat to convert liquid water at 100 C to vapor at 100 C.
    q4 = mass water x heat vap.

    qTotal = q1 + q2 + q3 + q4

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