Studied by 4 people
gas mixtures are homogeneous because of the….
random motion of particles
gases are compressible because of the….
large spaces between the particles
gas pressure is caused by….
collisions of particles with the walls of the container
more collisions equal….
more pressure
Pressure and Volume are ____ related
inversely
T and V are ____ related
directly
T and P are ____ related
directly
PV=nRT units
atm, L, moles, .08206, K
at STP, one mole of ideal gas equals….
22.4 liters
gas pressure and number of moles are ____ related
directly
molar mass equals….
dRT/P
density units
g/L
the more molar mass a gas has, the ____ it moves at a given temperature
slower
temperature equals…..
average kinetic energy
gases at the same temperature have the….
same average kinetic energy
when collecting a gas by water displacement….
P(total) = P(dry gas) + P(water vapor)
real gases behave most like an ideal gas at….
high temperature and low pressure
the more polar and larger a gas is, the more it will….
deviate from ideal behavior
what gases are the most ideal?
small, nonpolar gases
delta H for exothermic reactions are….
negative
exothermic reactions feel ___ because….
hot because heat is a product and temperature goes up
delta H for endothermic reactions are….
positive
endothermic reactions feel ____ because….
cool because heat is a reactant and temperature goes down
delta H for bond energies
bonds broken - bonds formed (reactants - products)
breaking bonds is….
endothermic
forming bonds is….
exothermic
delta H normally is….
sum of delta H(products) - sum of delta H(reactants)
if a reaction is exothermic, the bonds formed in the products are ____ than the reactant bonds
stronger and more stable
if a reaction is endothermic, the bonds formed in the products are ____ than the reactant bonds
weaker and less stable
if you double a reaction, delta H will….
double
if your reverse a reaction, delta H….
changes sign
if you are adding reactions, delta H is….
added
