Question

A person eats a container of strawberry yogurt. The Nutritional Facts label states that it contains 255 Calories (1 Calorie = 4186 J). What mass of perspiration would one have to lose to get rid of this energy? At body temperature, the latent heat of vaporization of water is 2.42 106 J/kg.

Answer 1

mass = 0.44 Kg

Step-by-step explanation:

given,

Calories contain in the strawberry yogurt = 255 calories

1 Calorie = 4186 J

latent heat of vaporization = 2.42 x 10⁶ J/Kg

mass of perspiration = ?

Energy = 255 calories

Energy = 255 x 4186

= 1067430 J

Energy = mass x latent heat of vaporization

`mass = (Q)/(L_v)`

`mass = (1067430)/(2.42 * 10^6)`

mass = 0.44 Kg