CHEM 121 MODULE 3 EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED GRADED A+
combined gas law (definition and when to use)
the relationship between the pressure, volume, and temperature of a fixed amount of gas.
describes the behavior of a gas when its temp or pressure is changed and should...
combined gas law (definition and when to use)
the relationship between the pressure, volume, and temperature of a fixed amount of
gas.
describes the behavior of a gas when its temp or pressure is changed and should be
used to do problems in which 2 pressures, volumes, or temperatures are given
combined gas law (equation)
P1V1/T1=P2V2/T2
volume (units) for combined gas law
units of liters (mL/1000)
pressure (units) for combined gas law
units of atm (mm/760)
temperature (units) for combined gas law
units of Kelvin (C+273)
gases (definition)
light, expandable, compressible, completely fill a container that they're in; they're very
far apart from each other, not attracted to one another, in constant/rapid motion. kinetic
molecular theory of gases
Effect of Temp on volume of gas
when temp increases, volume increases; positive correlation relationship
effect of volume on pressure of gas
when volume increases, pressure decreases. when volume decreases pressure
increases. they have an inverse relationship
effect of temperature on pressure of gas
, as temperature increases, pressure increases. they have a positive correlation
relationship
ideal gas law (definition)
relates to the pressure, volume, and temperature of a gas to the number of moles of gas
present.
ideal gas law (equation)
PV=nRT (PV=(g/MW)RT
ideal gaw law (finding volume equation)
V=nRT/P
Law of partial pressures (defintion)
when 2+ gases are mixed in a container each gas fills the entire container and exerts
the same pressure it would exert if it were the only gas in the container: states that the
total pressure of gases in container is equal to the sum of the partial pressures of the
individual gases present in the container equation
law of partial pressures (equation)
Daltons Law. Pt=P1+P2+P3...
mole fraction (definition)
- we can find mole fraction (x) by divinding individual pressures by total pressure
- (x) of a gas is amount that 1 gas makes up of the total and is calculated by dividing the
(n) of gas (n1) by the total (n's) of all gases (nT) and expressing this value as a decimal
mole fraction (equation)
X1=n1/nT (X1=mole fraction) (n1=moles of gas 1) (nT=total moles)
individual partial pressures are equal to (equations)
- P1 = (n1) (R x T) / V
- n1 / nT = P1 / PT
- P1 = n1 / nT (PT)
- P1 = X1 (PT)
mole percent (equation)
- =100(X1)
- =100(n1/nT)
ideal gaw law (finding pressure equation)
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