High-altitude mountain climbers do not eat snow, but always melt it first with a

Question

High-altitude mountain climbers do not eat snow, but always melt it first with a stove. To see why, calculate the energy absorbed from a climber's body under the following conditions. The specific heat of ice is 2100 J/kgC, the latent heat of fusion is 333 kJ/kg, the specific heat of water is 4186 J/kgC.

Calculate the energy absorbed from a climber's body if he eats 0.50kg of -15?C snow which his body warms to body temperature of 37?C.

Calculate the energy absorbed from a climber's body if he melts 0.50kg of -15?C snow using a stove and drink the resulting 0.50kg of water at 2?C, which his body has to warm to 37?C.

Explanation / Answer

a)energy absorbed by the body = 500*2.1*15 + 500* 333 + 500*4.186*37

=259691 Joules.

b)energy absorbed = 500*4.186*(37-2)

=73255 joules

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