[chimico]

Hi, could you help me with my doubts of chemistry ?

1) I read that it's possible fuse a -1 °C ice let unchanged the temperature but increasing the atmospheric pressur, is it real?
my book take the example of a skater that liquefy the ice by the blade, but depend only from the blade pressure or there is somewhat other like friction that liquefy?

2)If I keep some water at room temperature (20-25 °C) and I do nothing it will evaporate (i mean too slow) or the water need 100° compulsory also for evaporate a bit?

Pictures attached
pictures 1: the book ask me what is the right condensation diagram of pure alcohol, in my opinion is the d
pictures 2: how many states and phases are there in that cilinder? is right 4 phases and 2 states (solid and liquid) ?
pictures 3: what is the correct heating-diagram of brandy (water with 40% alcohol) ? i'm undecided between the a or the c

Thanks and sorry my english, i'm not english mother tongue!

[opti384]

1) Try searching for the phase diagram of water. It will help you understand relation between the pressure and the melting point of ice

2) Now the word evaporate could be tricky. In chemistry evaporation is different from boiling. While boiling occurs at the boiling point, evaporation can occur regardless of the temperature. Evaporation usually takes place in the surface of the liquid phase.

picture1 : the boiling points and melting points of pure substances always show consistent temperature at those
points.
picture2 : Aren't t phases and states synonyms?
picture3 : The temperature will remain the same at both the boiling point of alcohol and water.