chemistry

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what mass of a sample of gold requires 1.75 kJ to change its temperature from 28.2 degrees Celsius to 89.5 degrees Celsius?

  • chemistry -

    The equation needed is

    q=mc∆T

    where

    q=1.75 kJ =1750 j
    m=?
    c=0.129 J/g ºC

    ∆T=89.5ºC-28.2ºC=61.3ºC


    Solve for m,

    q/c∆T=m

    1750 j/[0.129 J/g ºC*(61.3ºC)]=m

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