HUMAN NUTRITION

NUTRITION

SPORTS NUTRITION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the calorific value of water?
A
10 joules/calorie
B
0 joules/calorie
C
25 joules/calorie
D
100 joules/calorie
Explanation: 

Detailed explanation-1: -Explanation: Water has the highest specific heat of any common substance at 1 calorie/gram °C = 4.186 joule/gram °C.

Detailed explanation-2: -The energy of vaporization (constant volume) for water is at 25 °C is 41.53 kJ/mol.

Detailed explanation-3: -The specific heat of water is 1 calorie/gram °C = 4.186 joule/gram °C which is higher than any other common substance.

Detailed explanation-4: -In modern usage it is the heat capacity of water, which at room temperature is 4186 Joules kg-1.

Detailed explanation-5: -You can, if you snack on ‘zero-calorie’ or ‘negative calorie’ foods. They are foods that contain some calories, but such a small number that the energy spent eating or digesting them nullifies the calories consumed.

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