What is the energy content of food?

Question

the complete combustion of 3.0g of a food produces enought heat to raise the tempature of 300g of water from 20C to 75C. Assuming no heat loss what is the energy contect for the food expressed in Calories/grams?

EXPLAIN YOUR ANSWER!

Answer 1

a calorie is the amount of energy needed to raise the temperature of 1 gram of water 1 degree celsius.

55 degrees * 300 grams = 16500

16500/3 (grams of food) = 5500 (small) calories per gram


5500 calories/gram

Answer 2

The Gram Calorie is the energy needed to increase the temperature of 1 gram of water by 1 degree Celcius. About 4.184 Joules, and 0.001 Kilogram Calories.

The Kilogram Calorie is the energy needed to increase the temperature of 1 Kilogram of water by 1 degree Celcius. About 4.184 kJ, and 1000 Gram Calories.

So, 300 g of water from 20 degree celcius is 55 x 1255.2 Joules, or the ammount of energy you need to raise 300 g of water 1 degree Celcius.

You get 69,036 Joules, and you need 16, 500 grams of Calories.

Answer 3

capability is measured in kilojoules of capability, or kilocalories the optimum source of capability comes from fat (lipids) as they might grant concentrated capability in small volume, working example, a tablespoon of olive oil supply you extra energy than a kit kat! This fat from the olive oil regardless of the undeniable fact that's supposedly extra healthy for you as that's monounsaturated. It will improve severe density lipoproteins, in charge for removing undesirable ldl cholesterol from arteries that ought to reason asthersclerotic plaques. in case you eat a nicely balanced food plan of around your RDA, supply or take finding on your metabolic standards, olive oil ought to in advantageous condition into your on a daily basis regime offering your physique capability to be in advantageous condition and healthy. the three substantial food nutrition are carbohydrates, proteins, lipids, yet there are super modifications and overlap between those. working example, interior proteins we've egg, lentils, milk, yogurt, meat, beans, tofu, nuts, yet those additionally contain a undeniable volume of fat and carbohydrate in specific circumstances. A danish whirl pastry might also have a blend of all 3. A lollipop is possibly to be all carbs, while an egg white is principally protein, and a citrus fruit-carbs, a tablespoon of peanut butter protein and lipids.

Answer 4

in food, calories is really kilo calories and 1 calorie is needed to raise 1 ml of water's temperature by 1 C. so 300g of water raise by 55 C needs 16500 calories, divide by 1000 so its 16.5, divide by 3 so its 5.5