Question

2. An exothermic reaction releases 86.5 kJ. How many kilocalories of energy are released?

Answer 1

Answer:

20.67 kcal of energy is released.

Explanation:

It is given that, an exothermic reaction releases 86.5 kJ. We need to convet kJ to calories.  

Since,

1 kcal = 4.184  kJ

So,

1 kJ = 0.239  kcal

For 86.5 kJ,

86.5 kJ = (0.239 × 86.5) kcal

86.5 kJ = 20.67 kcal

So, 20.67 kcal of energy is released.