Gas Laws Test
What is Charles' Law?
If pressure is constant and temperature increases then volume will increase and vice versa. V1/T1=V2/T2 Direct relationship
What is Boyle's Law?
If temperature is constant and pressure increases then volume will decrease. P1V1=P2V2 Indirect/inverse relationship
Charles Law only works if temp is recorded in ______.
Kelvin
V=
Liters (L)
What are the standard temperatures?
OºC or 273K
Ideal Gas Law Equation
PV=nRT
What variables must be held constant for Charles Law to be true?
Pressure & # of particles
What is the combined gas law?
Relationship between P, V, & T only constant is # of particles P1V1/T1 = P2V2/T2
What should happen to the pressure of a gas if the Kelvin temp. is doubled? (Charles Law)
The pressure of a gas will also double.
What would happen to the pressure of a gas if the Celsius temp. is double? (Charles Law)
The pressure will just go up a little.
Real example of Charles Law:
A real life example of Charles's law is leaving a basketball out in the cold weather. When a basketball if left in a cold garage or outside during the cold months, it loses its air inside (or volume). This is showing, with constant pressure, if the temperature drops, the volume decreases also.
P=
pressure (kPA, atm, mmHg)
T=
temperature (K)
n=
# of moles of gas (amount)
What are the standard pressures?
1 atm 101.3 kPa 760 mmHg
What is the purpose of the Ideal Gas Law?
Allows you to calculate the # of moles of a contained gas & moles is represented by the variable "n".
What is Gay-Lussac's Law?
As temperature increases, the pressure increases if volume and # of particles are held constant. P1/T1=P2/T2 direct relationship
What equation is used to convert from Celsius to Kelvin?
C + 273 = K
What are moles?
a unit of counting
What are the ideal gas constants for pressure?
atm: R= 0.082 kPa: R= 8.31 mmHg: R= 62.36
R=
ideal gas constant