You may have noticed that in spite of carefully measuring and calculating, the values for the specific heat you determined experimentally do not match the published values for those concentrations of propylene glycol solutions. Let's explore why. 1. Rosa suggests a source of error: • Save Some of the energy from the heating coil is lost because the insulation of the container is not perfect. What type of error will this cause? That is, will the experimental values for specific heat be higher or lower than the actual values? Explain your reasoning. BI U E = E E 8 D fx 2. Max forgot to subtract the mass of the container when he measured the mass of the liquid. How will this affect his • Save results? BI U ® O fx 3. Emma, a student, makes the following claim: My calculated value for the specific heat falls between the specific heat of the 20% solution and the 40% solution. I decided that the solution in my trial is the higher concentration, the 40% solution because it is more likely that my experimental value for the specific heat is higher than the actual value for my solution. Do you agree with Emma, or disagree. Provide reasoning and evidence from your own observations and measurements from the !!!
You may have noticed that in spite of carefully measuring and calculating, the values for the specific heat you determined experimentally do not match the published values for those concentrations of propylene glycol solutions. Let's explore why. 1. Rosa suggests a source of error: • Save Some of the energy from the heating coil is lost because the insulation of the container is not perfect. What type of error will this cause? That is, will the experimental values for specific heat be higher or lower than the actual values? Explain your reasoning. BI U E = E E 8 D fx 2. Max forgot to subtract the mass of the container when he measured the mass of the liquid. How will this affect his • Save results? BI U ® O fx 3. Emma, a student, makes the following claim: My calculated value for the specific heat falls between the specific heat of the 20% solution and the 40% solution. I decided that the solution in my trial is the higher concentration, the 40% solution because it is more likely that my experimental value for the specific heat is higher than the actual value for my solution. Do you agree with Emma, or disagree. Provide reasoning and evidence from your own observations and measurements from the !!!
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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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Question
Using specific heat to identify a substance
![You may have noticed that in spite of carefully measuring and calculating, the values for the specific heat you determined experimentally do not match the published values for those concentrations of propylene glycol solutions. Let's explore why.
1. Rosa suggests a source of error:
*Some of the energy from the heating coil is lost because the insulation of the container is not perfect.*
What type of error will this cause? That is, will the experimental values for specific heat be higher or lower than the actual values? Explain your reasoning.
[Text Box for Answer]
2. Max forgot to subtract the mass of the container when he measured the mass of the liquid. How will this affect his results?
[Text Box for Answer]
3. Emma, a student, makes the following claim:
*My calculated value for the specific heat falls between the specific heat of the 20% solution and the 40% solution. I decided that the solution in my trial is the higher concentration, the 40% solution because it is more likely that my experimental value for the specific heat is higher than the actual value for my solution.*
Do you agree with Emma, or disagree. Provide reasoning and evidence from your own observations and measurements from the video.
[Text Box for Answer]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd88f09c0-a835-4ed6-b3ce-b742324a11e6%2F82a175dd-d572-4c59-b3ed-9531728eb43d%2Fu6vrv6_processed.jpeg&w=3840&q=75)
Transcribed Image Text:You may have noticed that in spite of carefully measuring and calculating, the values for the specific heat you determined experimentally do not match the published values for those concentrations of propylene glycol solutions. Let's explore why.
1. Rosa suggests a source of error:
*Some of the energy from the heating coil is lost because the insulation of the container is not perfect.*
What type of error will this cause? That is, will the experimental values for specific heat be higher or lower than the actual values? Explain your reasoning.
[Text Box for Answer]
2. Max forgot to subtract the mass of the container when he measured the mass of the liquid. How will this affect his results?
[Text Box for Answer]
3. Emma, a student, makes the following claim:
*My calculated value for the specific heat falls between the specific heat of the 20% solution and the 40% solution. I decided that the solution in my trial is the higher concentration, the 40% solution because it is more likely that my experimental value for the specific heat is higher than the actual value for my solution.*
Do you agree with Emma, or disagree. Provide reasoning and evidence from your own observations and measurements from the video.
[Text Box for Answer]
Transcribed Image Text:### Experiment Results for Jack and Emma's Class
Here is a table showing the results for Jack and Emma's experiment on the specific heat capacity of different concentrations of propylene glycol (PG):
| Concentration of PG | \(T_i\) (°C) | \(T_f\) (°C) | \(\Delta T\) (°C) | Mass of Liquid (g) | Duration (s) | Observed C (J/g°C) | Actual C (J/g°C) | Percent Error |
|---------------------|------------|------------|------------|------------------|-----------|-----------------|-----------------|----------------|
| 0% | 21.8 | 31.22 | 9.42 | 473.3 | 908 | 4.313 | 4.184 | 3.09 |
| 20% | 21.58 | 30.78 | 9.2 | 488.9 | 886 | 4.172 | 3.983 | 4.75 |
| 40% | 21.61 | 31.52 | 9.91 | 499 | 902 | 3.855 | 3.718 | 3.68 |
| 60% | 21.51 | 32.89 | 11.38 | 485.9 | 900 | 3.447 | 3.361 | 2.57 |
| 80% | 21.57 | 34.12 | 12.55 | 502 | 900 | 3.026 | 2.904 | 4.19 |
| 100% | 21.64 | 36.29 | 14.65 | 481 | 900 | 2.705 | 2.51 | 7.77 |
### Observations and Analysis
When discussing class data, Jack notices a trend:
*The difference between the experimental value for the specific heat and the accepted value for the 100% propylene glycol solution (pure propylene glycol) is higher than the others.*
**Explanation Prompt:**
Provide an explanation for why this might be true
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