Which is more stable? half filled or full filled? why is it more stable?

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Ab c or d ? i’m not sure what the answer is