The student clearly stated the independent variable as the ethanol-to-water ratio and the dependent variable as the enthalpy change of combustion in the research question. The methodology for analysis was well-defined, detailing the use of bomb calorimetry and the experimental parameters. The student provided a thorough theoretical background, explaining relevant concepts such as ideal solutions and calorimetry, which enhanced the understanding of the investigation. While there was a clear explanation of the sampling technique and controlled variables, the student needed to improve the clarity regarding the measurement techniques for the independent and dependent variables. Overall, the methodology was sufficiently detailed and free from irrelevant information, allowing for reproducibility of the experiment.
