Chem 162 Exam 2 Questions and Verified Answers
IMF of 2 of a single atom. example: H2, Cl2, Br2
London (weak at that) because the two are identical (equal electronegativity charge) they
have no charge hence they are non polar.
vapor pressure
the pressure exerted by a vapor over a liquid. the pressure of trapped molecules in a
container as a vapor.
What is the vapor pressure of any ideal substance at its boiling point
1 atm
relationship between volatility(how easily sm turns into a gas) and vapor pressure(pressure
exerted by a vapor when the vapor is balanced with the liquid or solid form) are...
directly proportional- as one goes up/down so does the other
how does pressure effect boiling temp
with less pressure water boils at lower temps since with less pressure the liquid molecules
can turn into gas molecules with less energy
low surface tension means
, low IMF and it will be volatile (easily evaporated at low temps)
intra and inter forces determine what separately?
Inter determines physical properties while intra determines chemical properties
super critical fluid
combining the properties of a gas and a liquid where they are indistinguishable
critical temp
highest temp at which a substance can exist as a liquid
critical pressure
the minimum pressure required to liquefy a substance at its critical temperature
ions example
NaCl , HI , KBr
mass percent
mass of solute/mass of solution x 100
mole fraction
mol of Solute/ total moles
molality
moles of solute/kg of solvent
Normality
equivalents/L of solution
Molarity
mol solute/L solution
IMF of 2 of a single atom. example: H2, Cl2, Br2
London (weak at that) because the two are identical (equal electronegativity charge) they
have no charge hence they are non polar.
vapor pressure
the pressure exerted by a vapor over a liquid. the pressure of trapped molecules in a
container as a vapor.
What is the vapor pressure of any ideal substance at its boiling point
1 atm
relationship between volatility(how easily sm turns into a gas) and vapor pressure(pressure
exerted by a vapor when the vapor is balanced with the liquid or solid form) are...
directly proportional- as one goes up/down so does the other
how does pressure effect boiling temp
with less pressure water boils at lower temps since with less pressure the liquid molecules
can turn into gas molecules with less energy
low surface tension means
, low IMF and it will be volatile (easily evaporated at low temps)
intra and inter forces determine what separately?
Inter determines physical properties while intra determines chemical properties
super critical fluid
combining the properties of a gas and a liquid where they are indistinguishable
critical temp
highest temp at which a substance can exist as a liquid
critical pressure
the minimum pressure required to liquefy a substance at its critical temperature
ions example
NaCl , HI , KBr
mass percent
mass of solute/mass of solution x 100
mole fraction
mol of Solute/ total moles
molality
moles of solute/kg of solvent
Normality
equivalents/L of solution
Molarity
mol solute/L solution
