1. What is the essence of detemining the heat capacity of the calorimeter? Is it possible to replace the calorimeter in the middle of the experiment, say you use same type of calorimeter, but you borrowed from another group to perform part C and D? Why? 2. Explain the temperature profiles of the contents of the calorimeter. 3. What is the relationship of the temperature with the calculated AH? Compare the AH of the three reactions.

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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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PART A
PART B
PART C
PART D
NaOH
NaOH
HCI
NaOH
HCI
Components
H,O (1)
(s)
H,0 (1)
(s)
(s)
(aq)
(aq)
(aq)
Mass (g)
20g 100g
29
100g
29
Volume (mL)
100ml 50ml
50ml
Concentration
0.500M
1M
1M
...
...
...
(М)
Initial
20°C 20°C
Temperature
(°C)
-8°C
20°C
20°C
Final
25.21°C
31.83°C
Temperature
(°C)
2.70°C
26.81°C
Calculated
AH, =
AH, =
AH, =
2850.12 J
C = 0.12 JrC
Values
2180.49 J
4951.09 J
Transcribed Image Text:PART A PART B PART C PART D NaOH NaOH HCI NaOH HCI Components H,O (1) (s) H,0 (1) (s) (s) (aq) (aq) (aq) Mass (g) 20g 100g 29 100g 29 Volume (mL) 100ml 50ml 50ml Concentration 0.500M 1M 1M ... ... ... (М) Initial 20°C 20°C Temperature (°C) -8°C 20°C 20°C Final 25.21°C 31.83°C Temperature (°C) 2.70°C 26.81°C Calculated AH, = AH, = AH, = 2850.12 J C = 0.12 JrC Values 2180.49 J 4951.09 J
Guide Questions
1. What is the essence of determining the heat capacity of the calorimeter? Is it
possible to replace the calorimeter in the middle of the experiment, say you use
same type of calorimeter, but you borrowed from another group to perform part C
and D? Why?
2. Explain the temperature profiles of the contents of the calorimeter.
3. What is the relationship of the temperature with the calculated AH? Compare the
AH of the three reactions.
4. What is Hess's Law? Explain which part(s) of the experiment (procedure and/or
treatment) it is applied.
5. What are/could be the possible sources of error in this experiment?
6. Suppose you had used 4.00 grams of NaOH(s) in Reaction 1. What would have
been the number of Joules released in the reaction? What effect would this have on
the value of Xi?
Transcribed Image Text:Guide Questions 1. What is the essence of determining the heat capacity of the calorimeter? Is it possible to replace the calorimeter in the middle of the experiment, say you use same type of calorimeter, but you borrowed from another group to perform part C and D? Why? 2. Explain the temperature profiles of the contents of the calorimeter. 3. What is the relationship of the temperature with the calculated AH? Compare the AH of the three reactions. 4. What is Hess's Law? Explain which part(s) of the experiment (procedure and/or treatment) it is applied. 5. What are/could be the possible sources of error in this experiment? 6. Suppose you had used 4.00 grams of NaOH(s) in Reaction 1. What would have been the number of Joules released in the reaction? What effect would this have on the value of Xi?
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