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How much heat, in kJ, is required to melt 0.35kg of a metal at its melting point? The specific latent heat of the metal is 726kJ/kg.?

physical science help

4 Answers

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  • Anonymous
    1 month ago

    energy = mass * heat of fusion

     

    Include your units and convert as needed.

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  • david
    Lv 7
    1 month ago

    Multiply ...    0.35 X 726 kJ  =  254,1 kJ <<<  round as needed

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  • 1 month ago

    Heat required

    = m × Lf

    = (0.35 kg) × (726 kJ/kg)

    = 254 kJ

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  • 1 month ago

    Pay attention to the units and this problem works itself:

    (726 kJ/kg) x (0.35 kg) = 254.1 kJ = 250 kJ

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