Question

Gross Calorific Value For Carbohydrates, Proteins And Fats

Answer 1

Answer:

• fats: 9.45 kcal/g
• carbohydrates:4.1 kcal/g
• protein:5.65kcal/g

Answer 2

→ Heat is the ultimate source of all forms of energies. So energy requirements of animals and energy content of food are expressed as measure of heat energy.

→ Its unit is calorie (cal) or joule (J).

→ One calorie is the amount of heat l energy required to raise the temperature of Ig of water by 1°C.

→ This value is tiny amount of energy. So physiologists use kilocalorie or kilo joule.

→ One kilo calorie is the amount of energy required to raise the temperature of 1kg of water by 1°C.

→ Amount of heat liberated from complete combustion of lg food in a bomb calorimeter like, a closed metal chamber filled with O2 is its gross calorific value.

→ Actual amount of energy combustion of lg of food is the physiologic value of food.