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TABLE 2. Note that inside the coffee cup is 25 mL of distilled water (cp = 4.184 J/goC; density is 1.00 g/mL). The data you see is below. The other columns, you have to fill that in yourself...  Iconic Compound Mass(g) T(celsius) qsurr(J) qsys(J) Moles Hsys(KJ/mol) Exothermic or endothermic? Calcium Chloride 4.92 16.8           Ammonium nitrate 5.03 -17.5           Magnesium Sulfate 4.97 17.9           Sodium Carbonate 4.93 5.2

TABLE 2. Note that inside the coffee cup is 25 mL of distilled water (cp = 4.184 J/goC; density is 1.00 g/mL). The data you see is below. The other columns, you have to fill that in yourself...  Iconic Compound Mass(g) T(celsius) qsurr(J) qsys(J) Moles Hsys(KJ/mol) Exothermic or endothermic? Calcium Chloride 4.92 16.8           Ammonium nitrate 5.03 -17.5           Magnesium Sulfate 4.97 17.9           Sodium Carbonate 4.93 5.2

Chemistry by OpenStax (2015-05-04)
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter5: Thermochemistry
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TABLE 2. Note that inside the coffee cup is 25 mL of distilled water (cp = 4.184 J/goC; density is 1.00 g/mL). The data you see is below. The other columns, you have to fill that in yourself... 

Iconic Compound Mass(g) T(celsius) qsurr(J) qsys(J) Moles Hsys(KJ/mol) Exothermic or endothermic?
Calcium Chloride 4.92 16.8          
Ammonium nitrate 5.03 -17.5          
Magnesium Sulfate 4.97 17.9          
Sodium Carbonate 4.93 5.2          
7. Energy in Changes of State: The "Coffee Cup Calorimeter" This is a common fixture in the undergraduate laboratory; two cffee cups provide insulation to keep the energy of a chemical reaction or process (such as dissolution) inside; so that all energy is used to increase the energy of the internal fill (water); this is related to the change in enthalpy of the system. Despite its antique, "TV cop-show" appearance, Styrofoam is an excellent insulator, and the little thing works surprisingly well. In this example, you will calculate the heat exchanged when you add solid ionic compounds and stir the solids until they dissolve. Monitor the temperature in the solution until it no longer changes and begins to either drop OR rise again. This is the stopping point. Thermometer Styrofoem Cover Styroloam Cups Water Stirrer See what I just did? You aren't really doing any of this. We are all just imagining life without plague. I don't know about you, but I'm much younger in this virtual universe, and a darn sight richer. Let's see, google. Eagle E- type.is that ALL? 'll take two in #7adcc9 color, please. COFFEE CUP CALORIMETER EXAMPLE TABLE 2. Note that inside the coffee cup is 25 ml of distilled water (c = 4.184 Jig°C; density is 1.00 g/mL). The data you see is below. The other columns, you have to fill that in yourself.. lonic Compound Calcium chloride Ammonium nitrate Magnesium sulfate Sodium carbonate Mass (g) AT(°C) C() 9,(J) Moles AH, (kJ/mol) Exothermic or endothermic? 4.92 16.8 5.03 4.97 -17.5 17.9 4.93 5.2 From the above data, and remembering: 9sys - Asurr = 0
Transcribed Image Text:7. Energy in Changes of State: The "Coffee Cup Calorimeter" This is a common fixture in the undergraduate laboratory; two cffee cups provide insulation to keep the energy of a chemical reaction or process (such as dissolution) inside; so that all energy is used to increase the energy of the internal fill (water); this is related to the change in enthalpy of the system. Despite its antique, "TV cop-show" appearance, Styrofoam is an excellent insulator, and the little thing works surprisingly well. In this example, you will calculate the heat exchanged when you add solid ionic compounds and stir the solids until they dissolve. Monitor the temperature in the solution until it no longer changes and begins to either drop OR rise again. This is the stopping point. Thermometer Styrofoem Cover Styroloam Cups Water Stirrer See what I just did? You aren't really doing any of this. We are all just imagining life without plague. I don't know about you, but I'm much younger in this virtual universe, and a darn sight richer. Let's see, google. Eagle E- type.is that ALL? 'll take two in #7adcc9 color, please. COFFEE CUP CALORIMETER EXAMPLE TABLE 2. Note that inside the coffee cup is 25 ml of distilled water (c = 4.184 Jig°C; density is 1.00 g/mL). The data you see is below. The other columns, you have to fill that in yourself.. lonic Compound Calcium chloride Ammonium nitrate Magnesium sulfate Sodium carbonate Mass (g) AT(°C) C() 9,(J) Moles AH, (kJ/mol) Exothermic or endothermic? 4.92 16.8 5.03 4.97 -17.5 17.9 4.93 5.2 From the above data, and remembering: 9sys - Asurr = 0
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