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Homework Help: Molar Specific Heat

  1. Nov 20, 2009 #1
    1. The problem statement, all variables and given/known data
    A certain substance has a mass per mole of 55 g/mol. When 284 J is added as heat to a 32.0 g sample of this material, its temperature rises from 22.0°C to 39.5°C

    And I know that the specific heat of this substance is 507.14 J/[kg(K)]

    2. Relevant equations

    Q = mc[tex]\Delta[/tex]T

    3. The attempt at a solution

    55 g/mol * (1/32g) = 1.71875mol

    284J/[(1.71875mol)/(39.5-22)] = 9.44 J/[mol(K)]

    however..this is wrong and now I'm not sure where to go..help pleeeease!
  2. jcsd
  3. Nov 21, 2009 #2


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    Homework Helper

    I assume you used the information to find that.

    [tex]c= 507.14 \frac{J}{kgK}[/tex]

    for the substance, 1 mol has how much mass in kg?
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