A discussion of how heat engines work is not provided here. Suffice it to say, the engine cycle consists of two parts: the isobaric part (constant pressure) and the adiabatic part (no heat flow). These parts correspond to the addition/removal of mass on the piston, and the exposure of the air can to hot/cold temperature, respectively.
Initially, I was quite clueless with what to do with the piston apparatus, which costs P35,000 as repeated quite often by the person handling the equipment, since it was the first time for me to handle the device. It was not intuitive to me why the piston shifted height upon exposure of the air can to hot/cold temperature . I really had to think it over after the experiment. These deterrents caused me to be not much of a help with the procedural part of the experiment this week.