Helda Yanti, Sidauruk S, Asi NB. Students’ Difficulties in Understanding the Concept of Determining Reaction Enthalpy Changes in Grade XI-MIPA Senior High School for the 2022/2023 Academic Year Using Diagnostic Essay Tests. JIKT [Internet]. 2024Dec.31 [cited 2025Aug.25];15(2):443-50. Available from: https://chem-upr.education/ojs/index.php/JIKT/article/view/227