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Answer 2 Specific Heat Capacity Of Nickel Coins

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Subject
Chemistry
School
Miami Dade College
Type
Homework
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Specific Heat Capacity of Nickel Coins Using a Coffee Cup Calorimeter
Full Name
Partner’s Full Name
Date of Experiment
Introduction
Heat transfer is a common indication of a chemical reaction. A chemical reaction can
either release (exothermic) or absorb (endothermic) heat and the amount of heat can be measured
through calorimetry. The amount heat or absorbed by a substance during a chemical reaction
depends on its mass, specific heat, and change in temperature.
Specific heat capacity is the amount of heat needed to raise the temperature of 1g of a
substance to 1 degree Celsius (
o
C). For instance, specific heat of water, 4.184J/g
o
C, means that
4.184 joules is needed in order to raise the temperature of 1g of water to 1
o
C. The specific heat
capacity is a unique characteristic of each substances, hence it can be utilized to predict the
direction of heat transfer in a certain chemical reaction. It’s application is typically observed in
the other scientific fields such as physics, engineering and nutrition (Ling, et al., 2016).
The present experiment primarily aims to identify the specific heat capacity of nickel
using coffee cup calorimeter.
Experimental Procedure
1. Obtain the mass of 20 nickels using the balance.
2. Place the nickels into a test tube.
3. Place a thermometer in the test tube on top of 19 nickels, using the last nickel to keep to
thermometer from touching sides of the tube.
4. Clamp and immerse the test tube in a beaker of water over a stirrer/ hotplate. Ensure that
the level of water is above all of the nickel coins in the test tube. Heat the water to
boiling.
5. As the water is set to boil, obtain a Styrofoam cup with lid. Record the mass of the empty
cup and lid.
6. Accurately measure somewhere between 65 and 75mL of water, using 100mL graduated
cylinder. Record the actual volume.
7. Add the water to the Styrofoam cup. Record the mass of the cup, lid, and water.
8. Determine the mass of water by difference.
9. Place a temperature probe through the lid in the water in the Styrofoam cup.
10. When the temperature of the nickels reaches approximately 85
o
C, start recording the
temperature of the water in the Styrofoam cup. The temperature of the water in the
Styrofoam cup should not change. This will be the initial temperature of the water.
11. When the temperature of the nickels on the hotplate reaches approximately 90
o
C or
above, get ready to transfer them to the Styrofoam cup. This operation has to be done

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quickly and smoothly in order to minimize heat loss in the transfer process. The greater
the temperature of the nickel, the better.
12. Carefully undo the clamp holder holding the clamp to the test tube. Hold the clamp in
order to not burn oneself with the hot test tube. Once ready to transfer the nickels, record
first the temperature of the nickel coins. This will be the initial temperature of the nickel
coins. After this, quickly remove the thermometer from the test tube and quickly remove
the test tube from the hot water and place the nickels into the “coffee cup calorimeter.”
Ensure that the temperature probe does not come out of the water in the cup when adding
the nickels.
13. As soon as all the nickels have been added, swirl the cup and continue recording
temperature of water for the next 5 minutes.
14. At the end of 5 minutes, stop data collection.
15. Save and export the data.
16. Repeat the process 2 more times.
Data Table
Trial 1
Trial 2
Trial 3
Mass of Nickel Coins (g)
99.419
99.419
99.419
Volume of water used (mL)
70
70
70
Mass of water used (g)
67.951
68.752
68.819
Initial Temperature of Nickel Coins (
o
C)
94
90
92
Initial Temperature of Water (
o
C)
19
18.5
18
Final Temperature of Nickel Coins (
o
C)
29
27
26
Final Temperature of Water (
o
C)
29
27
26
T of Nickel Coins (
o
C)
-65
-63
-66
T of Water (
o
C)
10
8.5
8
Heat absorbed by water (J)
+2843.07
+2445.10
+2302.51
Heat lost by nickel coins (J)
-2843.07
-2445.10
-2302.51
Specific health of nickel coins (J/g
o
C)
0.44
0.39
0.35
Overall Results
General Observations
Average specific health of nickel coins
(J/g
o
C)
0.394
Warmer substance (nickel) lost
heat while colder substance
(water) gained heat.
Standard Deviation
0.036
RSD
0.092
Class average specific health of nickel
coins (J/g
o
C)
0.394
Time
Temperature (
o
C)
Trial 1
Trial 2
Trial 3
0
19
18.5
18

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Specific Heat Capacity of Nickel Coins Using a Coffee Cup Calorimeter Full Name Partner’s Full Name Date of Experiment Introduction Heat transfer is a common indication of a chemical reaction. A chemical reaction can either release (exothermic) or absorb (endothermic) heat and the amount of heat can be measured through calorimetry. The amount heat or absorbed by a substance during a chemical reaction depends on its mass, specific heat, and change in temperature. Specific heat capacity is the amount of heat needed to raise the temperature of 1g of a substance to 1 degree Celsius (oC). For instance, specific heat of water, 4.184J/g oC, means that 4.184 joules is needed in order to raise the temperature of 1g of water to 1oC. The specific heat capacity is a unique characteristic of each substances, hence it can be utilized to predict the direction of heat transfer in a certain chemical reaction. It’s application is typically observed in the other scientific fields such as physics, engineering and nutrition (Ling, et al., 2016). The present experiment primarily aims to identify the specific heat capacity of nickel using coffee cup calorimeter. Experimental Procedure 1. Obtain the mass of 20 nickels using the balance. 2. Place the nickels into a test tube. 3. Place a thermometer in the test tube on top of 19 nickels, using the last nickel to keep to thermometer from touching sides of the tube. 4. Clamp and immerse the test tube in a beaker of water over a stirrer/ hotplate. En ...
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