Answer: If a reaction releases 675,000 Joules then it means it releases 161.328872 kcal.
Step-by-step explanation:
According to the standard conversion,
![1 Joule = 0.000239006 kcal](https://img.qammunity.org/2022/formulas/chemistry/high-school/z61rryk6lgqn3jkfzvm309sdo4o0pnuxaa.png)
Therefore, 675,000 Joules will be converted into kcal as follows.
![1 Joule = 0.000239006 kcal\\675,000 J = 675000 J * (0.000239006 kcal)/(1 J)\\= 161.328872 kcal](https://img.qammunity.org/2022/formulas/chemistry/high-school/cemb4fd9p87jgv1fit1jb27m88z4jlfhqo.png)
Thus, we can conclude that if a reaction releases 675,000 Joules then it means it releases 161.328872 kcal.