energy transferred to the liquid wasn't enough to make it a gas (3)
Okay, we know that the lake started off as a liquid. (1)
That's the reason why the lake didn't change phase before 2007 (5)
that's only 1 factor that implies how titans lake didn't change before 2007 (6).
liquid usually has a medium attraction level, (2)
Molecules dont always change phase when energy is added in. (4)
--------Lake before 2007
Meaning that around 2002-2007 , energy kept being transferred in continuesly. (10)
since summer began around 2002, energy was still being transferred until it became a gas (7)
it would have to take in more energy , unlike those molecules with high attraction levels. (9)
The molecules were tking in energy, but since the molecules attraction level was medium, (8)
which after 2007, there was enough added-in energy to phase change it into a gas.(11)
-----the lake after 2007 ( a gas)
So to put it shortly, the lake didnt get enough energy to phase change , but after 2007 , when the molecules gained more kinetic energy , they gained more freedom of movement as well, leading for it to change phase after 2007.