A- What phase of water is represented by each region? b-Line A represents the temperature and pressure at which water vapor and one other phase can coexist. What is the other phase?
c- What is the point 4 known as? The _
d- What does point 1 represent? The _

Ions gain or lose electrons

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.