Flashcards in Chapter 5 Deck (44):
Gas volume changes with
pressure and volume
atmospheric pressure decreases with
the 4 variables that determine behavior of gasses
gas that has linear relationships among the 4 variables
are there true ideal gases?
what is Boyles law?
(not the formula)
at a constant temperature, the volume is inversely proportional to the pressure
what is the formula for Boyles law?
PV= constant (p1t1=p2v2)
at fixed pressure and temperature, P decreases as V
at a fixed temp. and pressure, P increases as V
What relationship does Boyles law illustrate with gases?
pressure & volume
What relationship does Charles law illustrate with gases?
temperature and volume
Absolute zero is what?
where an ideal gas would have 0 volume
what is the degree for absolute 0?
What is the proportional part of gases in Charles law?
temperature and volume
Volume decreases as temperature
volume increases as temperature
what is a unit for force
what is a unit for area
what is the formula for charles law?
v/t = constant (v1t1 = v2t2)
what is a unit for pressure
What is the combined gas law?
P1V1/T1 = P2V2/T2
what is STP
standard temperature & pressure
What is standard molar volume (not the number)
volume of 1 mol of an ideal gas at STP
What is the value of standard molar volume
What is the ideal gas law formula?
what is the value of R in the ideal gas law formula?
what is the density of a gas INVERSELY proportional to?
what is the density of a gas DIRECTLY proportional to?
M and m represent what?
M = moles/molarity & m = mass
what is the equation for finding density of a gas at STP?
d = MxP/RT then convert to moles
how do you manipulate the above equation (d=MP/RT) for a change in temperature?
add the temperature given to the constant temp. (273 K)
what is the equation for finding molar mass from the ideal gas law?
M = mRT/PV
Gases mix ____________ in any proportions
the pressure exerted by each gas in a mixture is called its _________?
what does Daltons law state about gases and pressure?
the total pressure is the sum of all of the partial pressures
the partial pressure of a gas is proportional to its_____?
what are the equations for finding total pressure? (Daltons Law)
P(a) = X(a) x P(total)
X(a) = n(a)/n(total)
what is the Kinetic molecular theory a model for?
How many postulates (points) are there in the Kinetic molecular theory?
what is the first postulate in the kinetic molecular theory?
-Gas particles are tiny with a lot of space between them
-the volume of each particle is so small compared to the overall volume it is assumed to be 0
what is the second point in the Kinetic molecular theory
particles are in straight, random, and constant motion except for when they collide with each other or container walls
what is the third point in the kinetic molecular theory?
-collisions are elastic (particles transfer energy but do not lose any b/c friction)
-total kinetic energy is constant
-particles do not influence each other outside of collisions