dogs keep themselves cool by panting, rapidly breathing air in and out. panting results in evaporation from moist tissues of the airway and lungs, which cools the animal. measurements show that, on a 35∘c day with a relative humidity of 50%, a 12 kg dog loses 1.0 g of water per minute if it is panting vigorously.



Answer :

Since water absorbs heat equivalent to mass times latent heat of evaporation in order to turn into vapor, it results in cooling. This results in a heat loss rate of 37.66 W in watts in Dog.

Evaporation:

Consequently, latent heat of water evaporation

= 2260 x 10³ J / kg or 2260 J / g

Now

1 g of water evaporates during the process,

heat lost = 2260 J

Moreover, heat loses every minute

= 2260 J

So,

Every second, heat is lost

= 2260 / 60

= 37.66 J /s

= 37.66 W

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