Here are the phase diagrams for water and carbon dioxide. Refer to these two phase diagrams to answer the following questions. 11. Consider the phase transformation in which ice melts: as pressure increases above 1.0 atm, the melting point a. increases b. decreases c. stays the same 12. Consider the phase transformation in which liquid water boils at L.0 atm: when pressure deereases, the boiling point a. increases b. decreases c. stays the same 13. The critical temperature for carbon dioxide is the critical temperature for water. a. higher than b. lower than c. the same as 14. The solid-vapor phase boundary of a phase diagram indicates the temperature at which substances a. melt b. sublime c. boil 15. The triple point indicates the a. temperature and pressure at which solid, liquid, and vapor are at equilibrium. b, temperature and pressure at which it becomes impossible to form vapor or liquid c. temperature and pressure at which the vapor becomes three times more dense than solid or liquid. 16. The solid-liquid phase boundary for carbon dioxide shows that the solid the liquid. a. is more dense than b. is less dense than c. has the same density as