Answer is: a<span> fruit and oatmeal bar contains 142000 calories. </span>A nutritional calorie<span>, or kilocalorie, is equal to 1000 calories. </span>E = 142 kcal · 1000 cal/kcal. E = 142 000 cal. Calorie (cal)<span>, or small calorie, is the amount of energy needed to heat one gram of water by one degree Celsius. </span><span>One small calorie is approximately 4.2 joules. </span>A calorie is a unit of energy.
The difference between the energy of the reactants and the energy of the products is called the enthalpy change (∆H) of the reaction. For an exothermic reaction, the enthalpy change is always negative. In an endothermic reaction, the products are at a higher energy than the reactants.
