A solid to a liquid, the boiling of water, solid the water molecules vibrate condensed but as a liquid they are still isolated in a controlled area and also reflect off one another more, liquid to a gas they do not and move freely until condensation occurs
PH + pOH = 14
pOH=14-8=4
(OH-)=10^-4
so one liter is about 2. something gallons so at 12.8 km/l you would get about 30 mpg which is insane but yeah