How do chemical properties of artificial sweetners contribute to the function of the synthetic material?

Can someone me with questions 15 to 17 plz.

When the water vapor cools it condenses select a number that represents his process on the

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.