To what extent do various concentrations of ethanol (0%, 5%, 10%, 15%, 20%, 25%) affect the specific heat capacity (measured in J kg-1K-1) of a water-ethanol solution , as measured by a calorimetric setup?SL
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6
Official IB Result
IB Grade: 6
Criteria A: Research Design
6/6
0
3
6
Criteria StrandsPro
A.1Research question context
Good
A.2Methodological considerations for collecting data
Moderate
A.3Methodological considerations
Poor
Criteria Feedback
- The student chose a focused investigation topic with a clear scientific purpose.
- The student showed some thoughtful control of variables and justified the concentration range with practical reasoning.
- The student's apparatus list, procedure, and repeat measurements provide a workable basis for reproducing much of the investigation.
- The research question is still not fully precise because the concentration is not clearly defined.
- Several important procedural details are missing, such as exact repeat numbers in the method and more specific setup instructions.
- Some parts of the design are internally inconsistent, especially around the stated hypothesis and the solution volume description.
Criteria B: Data Analysis
6/6
0
3
6
Criteria StrandsPro
B.1Communication of data recording and processing
Poor
B.2Consideration of uncertainties
Poor
B.3Data processing quality
Poor
Criteria Feedback
- The student presented raw data alongside processed values, which makes their working easier to follow.
- The student attempted to include uncertainty and error bars, showing awareness that measurements are not exact.
- The student used the correct general relationship for calculating specific heat capacity and identified an overall decreasing trend in the results.
- There are several numerical and unit inconsistencies in the processing, including mismatched uncertainty values and changing specific-heat-capacity results across tables.
- Some calculations are not shown clearly enough to make the workflow fully transparent or precise.
- The graphing and trend interpretation are not fully consistent with the tables and do not always use matching units or modelling language.
Criteria C: Conclusion
4/6
0
3
6
Criteria StrandsPro
C.1Conclusion relevance and support
Moderate
C.2Scientific context comparison
Poor
Criteria Feedback
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- Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
- Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
Criteria D: Evaluation
3/6
0
3
6
Criteria StrandsPro
D.1Methodological weaknesses
Moderate
D.2Suggested improvements
Poor
Criteria Feedback
- Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
- Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
- Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.