The student clearly stated the independent variable as the mass of dissolved ammonium nitrate and the dependent variable as the molar enthalpy change, ΔH, in the research question. However, the student did not specify the method of analysis, such as calorimetry, which would clarify how the molar enthalpy change would be measured. The methodology was well-structured, including detailed descriptions of the materials and procedures, ensuring reproducibility. The student addressed controlled variables, safety concerns, and environmental issues effectively, but failed to discuss any ethical considerations associated with the investigation. Overall, the methodology was clear and free of irrelevant information, making it easy to understand.
