Chem302 Unit 1 Episodes 1-4 Flashcards
Entropy def
Dispersal of energy at constant temp
Enthalpy def
Transfer of heat energy at constant p
Work def
Organized molecular motion
Gibbs free energy def
Energy available to do work
What type of rxn is more favorable
Exothermic
BP def
Temp which all liquids boil and break ALL IMFs
Normal BP def
Temp at pressure of 1 atm
How does increasing temp impact dissolution of solid solutes
Increases entropy
Solid disoolves
How does increasing temp impact dissolution of gas solute in solvent
Decreases entropy
Gas bubbles out of solution
How does increasing temp impact dissolution of liquid solutes
Not necessarily about temp, like dissolves like
All covalent solutes are …
Non electrolytes
Weak electrolyte
Less than 100 percent dissociation
Strong electrolyte
More than 100 percent dissociation
Non electrolyte
No dissociation at all
Vant Hoff factor formula
Moles particles in solution / moles formula units(usually 1) dissolved
Ex. Na cl = 2
Comparing heat of vapor ization is about comparing what?
IMFS!
What impacts VP?
ONLY temperature!!
Does adding water to a container affect VP and why?
IT DOES NOT AFFECT VP the vp would remain the SAME becuase VP is just the pressure exerted by a vapor that exists in EQUILIBRIUM with is liquid phase
If temperature is the same for both containers what is the vapor pressure(VP) for both containers
The vapor pressure (VP) for both containers is the same1
What does it mean if a solid sublimes
The pressure will be less than the VP so the solid will never reach equilibrium with the gas and the system will turn entirely into gas
How does the energy shift in Exothermic reactions
The energy level goes from high to low
If both in liquid phase a molecule with strong IMFS will have a lower H than…
Molecule with weaker IMFS
The stronger the what ? The larger the H vap will be btwn phases
INTERmolecular forces(between)
Water is NOT
Aqueous
When we dissolve salt into solvent what is the sign of triangle H of lattice energy
Positive because it takes energy to break apart the salt
Often LE is NEGATIVE because
We are FORMING a crystal
