Answer :
The substance releases approximately 9.41 kilocalories of energy.
Kilocalories, often abbreviated as kcal, are units of energy commonly used to measure the energy content of food and the energy expended during physical activities. One kilocalorie is equal to 1,000 calories.
The term "calories" used in the context of nutrition and diet refers to kilocalories, but the "kilo" prefix is often omitted for simplicity. So, when you see "calories" listed on food labels or nutritional information, it actually refers to kilocalories.
To convert from kilojoules (kJ) to kilocalories (kcal), you can use the conversion factor 1 kcal = 4.184 kJ.
Given that the substance releases 39.4 kJ of energy, we can calculate the equivalent energy in kilocalories as follows:
39.4 kJ * (1 kcal / 4.184 kJ) = 9.41 kcal
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