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