Question

In an experiment, 0.502 kg of metal at 100. C∘

is added to 30.0 kg of water at 20.0 C∘

in an

aluminum calorimeter cup of mass 0.250 kg. The final temperature of
the system is 50.0 C∘

a. (5 points) If a calorimetry was to be performed on the system,
what is/are the

assumption(s) you would make for the system?

b. (15 points) Calculate the specific heat capacity and heat
capacity of the unknown metal.

Answer #1

An unknown metal of mass 0.280 kg is heated to 160.0°C and
dropped in an aluminum calorimeter of mass 0.250 kg that contains
0.170 kg of water at 30°C. The calorimeter, water, and unknown
metal have a final temperature of 46.0°C. Find the specific heat of
the unknown metal. Hint: you need the specific heat of water and
aluminum. Use units of [J/(kg.K)] and the values in your book for
the specific heat.

a coffe cup calorimetry experiment was performed in a general
chemistry class. Two lab partners added 78.9g of lead initally at a
temperature of 102.1 degrees celcuis, to a sample of water in a
coffee-cup calorimeter. the water in the calorimeter startedout at
22.9 degrees celcuis, once the temperature of the water and the
metal equilibrated the final temperature of both was 24.3 degree
celcuis. Calculate the mass of water that must have been in their
calorimeter. The spefific capacity...

In a calorimetry experiment to determine the specific heat
capacity of a metal block, the following data was recorded:
Quantity
Mass of the metal block
0.50 kg
Mass of empty calorimeter + Stirrer
0.06 kg
Mass of calorimeter + stirrer + water
0.20 kg
Mass of water
0.14 kg
Initial Temperature of metal block
55.5 ⁰C
Initial Temperature of water and calorimeter
22 ⁰C
Final Temperature of block- water system
27.4 ⁰C
Take the specific heat capacity of water to...

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)

A student obtains the following data in a calorimetry experiment
designed to measure the specific heat of aluminum.
Initial temperature of water and calorimeter 70.4°C
Mass of water 0.403 kg
Mass of calorimeter 0.04 kg
Specific heat of calorimeter 0.60 kJ/kg·°C
Initial temperature of aluminum 27.1°C
Mass of aluminum 0.196 kg
Final temperature of mixture 66.4°C
(a) Use these data to determine the specific heat of aluminum.
J/kg · °C
(b) Is your result within 15% of 900 J/kg ·...

In an experiment, 22.5 g of metal was heated to 98.0°C and then
quickly transferred to 150.0 g of water in a calorimeter. The
initial temperature of the water was 27.0°C, and the final
temperature after the addition of the metal was 32.5°C. Assume the
calorimeter behaves ideally and does not absorb or release
heat.
What is the value of the specific heat capacity (in J/g•°C) of
the metal?

In an experiment, 25.5 g of metal was heated to 98.0°C and then
quickly transferred to 150.0 g of water in a calorimeter. The
initial temperature of the water was 21.0°C, and the final
temperature after the addition of the metal was 32.5°C. Assume the
calorimeter behaves ideally and does not absorb or release
heat.
What is the value of the specific heat capacity (in J/g•°C) of
the metal?

In an experiment, 26.0 g of metal was heated to 98.0°C and then
quickly transferred to 150.0 g of water in a calorimeter. The
initial temperature of the water was 20.5°C, and the final
temperature after the addition of the metal was 32.5°C. Assume the
calorimeter behaves ideally and does not absorb or release
heat.
What is the value of the specific heat capacity (in J/g•°C) of
the metal?
_________________ J/g•°C

a. An ice cold piece of aluminum metal is added to 50.0 g of hot
water. Given the average initial temperature (76 C) calculated
above for the hot water, calculate the heat, q, in joules of the
piece of aluminum metal if the final temperature of the water is
40.0 °C. The specific heat of water is 4.184 J/g-°C. (0.50) b.
Calculate the grams of aluminum metal used if the specific heat of
aluminum is 0.895 J/g-°C. (0.50)

A 48.2 g sample of a metal is heated to 95.8 degrees C and
placed in a coffee-cup calorimeter containing 79.0 g of water at a
temperature of 18.5 degrees C. After the metal cools, the final
temperature of the metal and water is 22.8 degrees C. Calculate the
specific heat capacity of the metal, assuming that no heat escapes
to the surroundings or is transferred to the calorimeter.

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