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8 December, 08:45

A student 600 ml cup of cocoa gets cold. It was only 25°C. He put it in the microwave. How many calories must transfer to the cocoa to bring it up to 70°C

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  1. 8 December, 09:04
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    To get the answer, you must know first the formula for heat.

    Heat = mass X specific heat X change in temp

    We know that the mass is 600

    Specific heat is 1

    And the change in temperature is 70 - 25 which is 45.

    Now plugging in those values:

    Heat = 600 x 1 x 45 = 27,000 calories

    Note: calorie is a unit of heat
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