sublimation vocab
hydrate
a crystal thats made up of a substance chemically combined with water in a fixed ratio
example of a deliquenscent substance
calcium chloride crystals
anhydrous
crystals without water in their composition
examples of subliming substances
dry ice
what do TRUE solids form?
geometric figures in which atoms are arranged in regular repeating pattern
crystals
geometric forms in true solids that have plane surfaces at definite angles to each other
other ways crystals are formed?
iodine vapour in sublimation/ when sulfur cools
crystal lattice
pattern of atoms/molecs in a crystal
sublimation
process when solid goes directly to vapour without passing liquid phase
deliquescent
solid substances that absorb enough moisture in the air to dissolve themselves in it
efflorescence
spontaneous loss of water of hydration from a substance at room temp
hygroscopic
substances that absorb moisture from air
what is decrepitation caused by?
the heating of anhydrous crystals
deliquenscence
the process by which solid substances absorb enough moisture form air to dissolve themselves in it
sublime
the substance undergoing sublimation
crystal formation
water is evaporated from salt solution and remaining salt forms a precipitate in form of crystals
water of hydration
water with which the hydrate has been combined
when are small crystals formed?
when evaporation of water is rapid
when are large crystals formed?
when evaporation of water is slow
decrepitation
when mechanically enclosed water changes to steam and blows crystals apart