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12 March, 21:38

The specific heat of ethanol is 2.44 J/g ֯C. How many kJ of energy are required to heat 50.0 grams of ethanol from - 20 ֯C to 68 ֯C? (heat equation)

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  1. 13 March, 00:37
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    Heat energy required (Q) = 10.736 KJ

    Explanation:

    Given:

    Specific heat of ethanol (C) = 2.44 J/g °C

    Mass of ethanol (M) = 50 gram

    Initial temperature (T1) = - 20°C

    Final temperature (T1) = 68°C

    Find:

    Heat energy required (Q) = ?

    Computation:

    Change in temperature (ΔT) = 68°C - (-20°C)

    Change in temperature (ΔT) = 88°C

    Heat energy required (Q) = mC (ΔT)

    Heat energy required (Q) = (50) (2.44) (88)

    Heat energy required (Q) = 10,736 J

    Heat energy required (Q) = 10.736 KJ
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