Respuesta :

First, we must know that:

1 cal = 4.186 J ==> 1000 cal = 4186 J or 1 kcal = 4.186 kJ

(sometimes the heat reaction involves these units)

Now, 17.69 kcal x (4.186 kJ/1 kcal) = 74.05 kJ

Answer: 74.05 kJ

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