unit 2) gasses Flashcards
what creates pressure
pressure produced due to
collisions molecules bouncing against each
other and sides of its container
what happens to volume when temp increases / decreases
Volume expands when heated,
contracts when cooled
how do molecules move when temp increases/ decreases
Molecules move faster at higher
temperatures, slower at lower
temperatures
boyles law type of proportion relatopnship between p and v
Pressure and volume are inversely
proportional
boyles law what increases / decreases and why
as pressure increases volume decreases when pressure decreases volume increases - thats because when volume reduced theres less space so more collisons and more pressure
Charles Law type of relationship
Volume and temperature are directly proportional
charles law what increases/ decreases and why
as temperature increases, volume increases temp decreases volume decreases - thats because more temp means move more fast with more force pushing on walls making more space (volume)
whats an ideal gas
its how theroretically a perfect gas would act
ideal gasses traits
Molecules do not have attractive forms
between each other because theyre soooo far apart
Do not condense at lower temperature
molecules are hard and dont change shape when collide
real gasses traits
Molecules have some attractive forces
between each other (intermolecular forces)
Condense at low temperature
are soft and with collisions they change shape
when stp or satp what does it stand for
it gives info on the pressure and the temp and also volume
when there are constant values in an equation what do you do
you cross it out
when a question wants in celcuis and theres no temp in equation what do you do
even if theres no temp in equation it still means it had to be in k because c cannot be in an equation so still -273
when would you switch ml to L
when a question has 2 steps for example finding number of moles then using either molar volume / mass
how do you solve law of combing volues problems
1) write a chemical formula thats balanced
2) find out what value is given (if it gives volume of compound ) then find out what youre finding
3) then after you find out what looking for you times volume of given by fraction with coeff of element looking for / coeff of given
