Chapter #14
Question #12,
The value of specific heat for copper is 390 J/kg⋅C∘, foraluminun is 900 J/kg⋅C∘, and for water is 4186 J/kg⋅C∘.
Part A
What will be the equilibrium temperature when a 265 g block ofcopper at 255 ∘C is placed in a 155 g aluminum calorimeter cupcontaining 865 g of water at 12.0 ∘C?
Express your answer using three significant figures.
T =Â Â
Question #13
High-altitude mountain climbers do not eat snow, but always meltit first with a stove. To see why, calculate the energy absorbedfrom a climber's body under the following conditions. The specificheat of ice is 2100 J/kg⋅C∘, the latent heat of fusion is 333kJ/kg, the specific heat of water is 4186 J/kg⋅C∘.
Part A
Calculate the energy absorbed from a climber's body if he eats 0.85kg of -15∘C snow which his body warms to body temperature of37∘C.
Express your answer to two significant figures and include theappropriate units.
Q1 =Â Â
Part B
Calculate the energy absorbed from a climber's body if he melts0.85 kg of -15∘C snow using a stove and drink the resulting 0.85 kgof water at 2∘C, which his body has to warm to 37∘C.
Express your answer to two significant figures and include theappropriate units.
Q2 =Â Â
