Question

A 215-g sample of a substance is heated to 350 ∘C and then plunged into a 105-g aluminum calorimeter cup containing 185 g of water and a 17-g glass thermometer at 12.5 ∘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.

Answer #1

heat rejected by the substance will be absorbed by aluminium calorimeter , water and glass thermometer.

dQ = mc dT

where m is mass

c is the specific heat

and dT is change in temperature.

m_{sub} c_{sub} (T_{i sub} -
T_{final} ) = m_{Al} c_{Al}
(T_{final} - T_{i Al} ) + m_{w}
c_{w} (T_{final} - T_{i w} ) +
m_{g} c_{g} (T_{final} - T_{i
g})

m_{sub} c_{sub} (T_{i sub} -
T_{final} ) = 0.105 kg x 900 J/kg C^{0} ( 35 - 12.5
) + 0.185 kg x 4186 J/kg C^{0} ( 35 - 12.5 ) +0.017 kg x
840J/kg C^{0} (35 - 12.5)

m_{sub} c_{sub} (T_{i sub} -
T_{final} ) = 883. 19 x 22.5

0.215 kg x c_{sub} (350 - 35) = 883. 19 x 22.5

c _{sub} = (883. 19 x 22.5) / ( 0.215 x 315 )

c_{sub} = 293.4186 J/kgC^{0}

A 235-g sample of a substance is heated to 320 ∘C and then
plunged into a 105-g aluminum calorimeter cup containing 175 g of
water and a 17-g glass thermometer at 10.5 ∘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∘ . Part A What is the specific heat of the substance?
(Assume no water boils away.) Express your answer...

You are given an unknown substance with mass of 400.0 g. The
unknown substance is heated to a temperature of 97.0°C, and then
dropped into a calorimeter that is at an initial temperature of
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and 10.0 g stirrer (also aluminum). The mass of the inner cup plus
water is 340.0 g. When equilibrium is established, the temperature
is 22.0°C. There are no phase changes.
1. What is the...

A student doing an experiment pours 0.500 kg of heated metal
whose temperature is 98.0 oC into a 0.356 kg aluminum
calorimeter cup containing 0.418 kg of water at 28.0 °C. The
mixture (and the cup) comes to thermal equilibrium at 38.0 °C. The
specific heat of the metal is ________ J/kg oC.
(specific heat of aluminum = 900 J/kg oC, specific heat
of water = 4186 J/kg oC)

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copper at 245 ∘C is placed in a 155 g aluminum calorimeter cup
containing 815 g of water at 16.0 ∘C?

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is placed in a 155 g aluminum calorimeter cup containing 875 g of
water at 12.0 ∘C?

The value of specific heat for copper is 390 J/kg?C?, for
aluminun is 900 J/kg?C?, and for water is 4186 J/kg?C?. What will
be the equilibrium temperature when a 215 g block of copper at 255
?C is placed in a 155 g aluminum calorimeter cup containing 875 g
of water at 16.0 ?C?

A 37.5-g glass thermometer reads 24.1 ∘C before it is placed in
123 mL of water. When the water and thermometer come to
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water is 4186 J/kg⋅C∘, and for glass is 840 J/kg⋅C∘.
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Express your answer using three significant figures.

008
A 0.0456 kg ingot of metal is heated to 215◦C and then is
dropped into a beaker containing 0.415 kg of water initially at
19◦C. If the final equilibrium state of the mixed system is 21.4
◦C, find the specific heat of the metal. The specific heat of water
is 4186 J/kg · ◦ C.
Answer in units of J/kg · ◦ C.

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aluminun is 900 J/kg⋅C∘, and for water is 4186 J/kg⋅C∘.
What will be the equilibrium temperature when a 215 g block of
copper at 255 ∘C is placed in a 155 g aluminum calorimeter cup
containing 845 g of water at 14.0 ∘C?
Express your answer using three significant figures.

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