14.1 Part A When a diver jumps into a lake, water leaks into the gap region between the diver's skin and her wetsuit, fo
Posted: Mon May 09, 2022 5:58 pm
14.1
Part A
When a diver jumps into a lake, water leaks into the
gap region between the diver's skin and her wetsuit, forming a
water layer about 0.5 mm thick. Assume that the
total surface area of the wetsuit covering the diver is
about 1.0 m2, and that the water enters
the suit at 13 ∘C and is warmed by the diver to skin
temperature of 35∘C. The specific heat of water
is 1.00 kcal/kg⋅C∘.
Estimate how much energy (in units of candy
bars = 300 kcal) is required by this heating
process.
Express your answer using two significant
figures.
Q = _______________ Candy Bars
Part B
An automobile cooling system holds 16 L of
water. The specific heat of water
is 4186 J/kg⋅C∘
How much heat does it absorb if its temperature
rises from 18 ∘C to 81 ∘C?
Express your answer to two significant figures and
include the appropriate units.
Q =
Part C
A 235-g sample of a substance is heated to
320 ∘C and then plunged into a 105-g aluminum
calorimeter cup containing 165 g of water and
a 17-g glass thermometer at 13.5 ∘C. The final
temperature is 35.0∘C. The value of specific heat for aluminium
is 900 J/kg⋅C∘ , for glass
is 840 J/kg⋅C∘ , and for water
is 4186 J/kg⋅C∘ .
What is the specific heat of the substance? (Assume
no water boils away.)
Express your answer using three significant
figures.
C = ___________________
J/kg⋅C∘
Part A
When a diver jumps into a lake, water leaks into the
gap region between the diver's skin and her wetsuit, forming a
water layer about 0.5 mm thick. Assume that the
total surface area of the wetsuit covering the diver is
about 1.0 m2, and that the water enters
the suit at 13 ∘C and is warmed by the diver to skin
temperature of 35∘C. The specific heat of water
is 1.00 kcal/kg⋅C∘.
Estimate how much energy (in units of candy
bars = 300 kcal) is required by this heating
process.
Express your answer using two significant
figures.
Q = _______________ Candy Bars
Part B
An automobile cooling system holds 16 L of
water. The specific heat of water
is 4186 J/kg⋅C∘
How much heat does it absorb if its temperature
rises from 18 ∘C to 81 ∘C?
Express your answer to two significant figures and
include the appropriate units.
Q =
Part C
A 235-g sample of a substance is heated to
320 ∘C and then plunged into a 105-g aluminum
calorimeter cup containing 165 g of water and
a 17-g glass thermometer at 13.5 ∘C. The final
temperature is 35.0∘C. The value of specific heat for aluminium
is 900 J/kg⋅C∘ , for glass
is 840 J/kg⋅C∘ , and for water
is 4186 J/kg⋅C∘ .
What is the specific heat of the substance? (Assume
no water boils away.)
Express your answer using three significant
figures.
C = ___________________
J/kg⋅C∘