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.

Part A

To see why, calculate the energy absorbed from your body if you eat 1.0 kg of -8 C snow which your body warms to body temperature of 37C.

Express your answer to two significant figures and include the appropriate units.

Q =

Part B

Calculate the energy absorbed from your body if you melt 1.0 kg of -8 C snow using a stove and drink the resulting 1.0 kg of water at 7 C, which your body has to warm to 37C.

Express your answer to two significant figures and include the appropriate units.

Q =

Explanation / Answer

specific heat of water C = 4186 J/kg/oC

specific heat of ice C = 2108 J/kg/oC

latent heat of ice = 334*1000 J/kg

Part A: m = 1 kg , Ti = -8 oC, Tf = 37 oC

Q = (1*2108*(0+8))+(1*334*1000) +(1*4186*(37-0))

Q = 505746 J

Q = 5.1*10^5 J

Part B : m = 1, Ti = 7 0C, Tf = 37 oC

Q = 1*4186*(37-7)

Q = 125580 J

Q= 1.3*10^5 J

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.