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18 December, 07:26

How much heat is needed to change the temperature of 3 grams of gold (c = 0.129) from 21°C to 363°C? The answer is expressed to the nearest whole number.

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  1. 18 December, 08:52
    0
    Q = mcΔT

    Where Q is heat or energy

    M is mass, c is heat capacitance and t is temperature

    You have to convert Celsius into kelvin in order to use this formula I believe

    Celsius + 273 = Kelvin

    21 + 273 = 294K

    363 + 273 = 636K

    Now ...

    Q = (0.003) (0.129) (636-294)

    Q = 0.132 J if you are using kilograms, in terms of grams which seems more appropriate the answer would be 132J of energy.
  2. 18 December, 10:00
    0
    It's 132 or B on edge 2020
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