Answer:
option D 13600 J
Explanation:
This is actually a simple convertion problem. the energy expressed as heat in calories, has a convertion in Joules.
In the case of cal to Joules is the following:
1 cal -----> 4.184 J
So, let's convert first the kcal to cal:
3.25 kcal * 1000 cal/kcal = 3250 cal
Now, using the conversion factor of above we have:
J = 3250 cal * 4.184 J/cal
J = 13,598 J or rounded to 13,600 J option D
