Question

60.8 J of energy is required to change the temperature of 25.0 g of ethylene glycol (a compound used as an antifreeze in automobile engines) by 1.0 K. Calculate heat capacity of ethylene glycol.

Solution

We know that
 $straight q space equals space straight c space cross times space straight m space cross times space increment straight T or space space space space space space space straight c space equals space fraction numerator straight q over denominator straight m space cross times space increment straight T end fraction space space space space space space space space space space space space space space space space space space space... left parenthesis 1 right parenthesis space$
Here, q = 68.8J; m = 25.0 g,
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Substituting the values in eq. (1), we have,
 $straight c space equals space fraction numerator 60.8 straight J over denominator left parenthesis 25.0 right parenthesis thin space left parenthesis 1.0 space straight K right parenthesis end fraction space equals space 2.43 space straight J space straight g to the power of negative 1 end exponent straight K to the power of negative 1 end exponent$

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Thermodynamics

60.8 J of energy is required to change the temperature of 25.0 g of ethylene glycol (a compound used as an antifreeze in automobile engines) by 1.0 K. Calculate heat capacity of ethylene glycol.

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