Question

A hot pack contains 715g of water at 60 degrees Celsius. If the water cools to body temperature, how many kilocalories of heat could be transferred to an inflamed ankle?

Answer 1

Answer:

49822 joules of heat can be transferred to ankle from heat bag.

Explanation:

We know that average body temperature should be 37 degree centigrade

Hot water bag has 715 grams of water present in it. Specific heat of 1 gram of water is 4.18 joules per gram per degree centigrade. 715 grams will have $715 \times 4.18= 2988.7 j$

The degree of water that is given is 60° hence specific heat becomes$179322 \ j$

Specific heat of body at 37° centigrade will be = $129500 \ j$

The amount of heat that can be transferred from hot bag will be $179322 - 129500 = 49822 \ j$