Abstract
This study explores how laboratory activity with the argumentative approach could promote
students' conceptual understanding in the Hess' law energy cycle through laboratory work.
Laboratory work with an argument-based inquiry instructional strategy was set up to 15 preuniversity
students from one of the Form 6 Centre at the West Coast Division of Sabah, Malaysia.
The laboratory work consists of a guided inquiry-based instruction with an argumentative approach
in the topic of thermochemistry. The students' understanding of the energy processes was analyzed
with a qualitative method using a semi-structured interview and triangulated with conversation
analysis. The data collected from students' conversation during the activity was then triangulated
with reflective writing at the end of the laboratory lesson. The study shows the students' prior
knowledge and argumentation discourse significantly influences the development of conceptual
understanding. This study emphasizes argument-based inquiry (ABIIS) in laboratory work to
enhance their conceptual knowledge in the laboratory.