Temperature-defined asthe degree of
hotness or coldness.
degree Celsius
degree Fahrenheit
kelvin (K)
o
C=5/9 (O
F-32)
O
F=9/5 (O
C + 32)
18.
Filling a cartire with compressed air pressure ranging from 30-35 psi. As you put more
and more air into the tire, you are forcing all the gas molecules to get packed
together, reducing their volume and increasing the pressure pushing the walls of the
tire.
Sample Problem:
A balloonwith a volume of 2.0 L is filled with a gas at 3 atmospheres. If the pressure is
reduced to 0.5 atmospheres without a change in temperature, what would be the
volume of a balloon?
Given:
P1 = 3 atm
P2 = 0.5 atm
V1 = 2.0 L
V2 = ?
V2 = (3 atm) (2.0L)
0.5 atm
12L
P2 = 0.5 atm
27.
Sample Problem:
An idealgas occupying a 20.0 L flask at 1 atm is allowed to expand to a volume of 6.0L.
Calculate the final pressure in atm.
Given:
P1 = 1.00 atm
P2 = ?
V1 = 2.0 L
V2 = 6.0 L
P2 = (1.00 atm) (2.0L)
6.0 L
0.33 atm
30.
1. Who wasthe English scientist who made accurate
observations on the relationship between pressure and
volume.
a. Jacques Charles c. Amedeo Avogadro
b. Robert Boyle d. Gay-Lussac
2. Which of the following is constant when using Boyle’s
Law?
a. energy c. volume
b. temperature d. pressure
31.
3. Which ofthe following quantities need to remain constant
when using Boyle’s Law?
a. mass and temperature c. volume and pressure
b. mass and pressure d. volume and temperature
4. In the equation for Boyles’s Law, P1 stands for?
a. initial velocity
b. final pressure
c. initial pressure
d. final volume
32.
5. Which statementdescribes the volume-pressure
relationship in gases at constant temperature.
a. As pressure decreases, volume also increases.
b. As pressure increases, volume remains constant.
c. As pressure increases, volume remains constant.
d. As pressure remains constant, volume increase.
6. When pressure of a gas goes down, what will happen to
its volume?
a. Rises c. stays the same
b. Rises then falls d. goes down then rises
33.
7. Which ofthe following graph correctly represents the
relationship between pressure and the volume of an ideal
gas that is held at constant temperature.
34.
8. Which ofthe following needs to remain constant when
using Boyle’s Law.
a. energy b. pressure c. volume d. temperature
9. In the equation for Boyle’s Law, V2 stands for:
a. difference in volume
b. final volume
c. initial volume
d. standard volume
35.
10. Which ofthe following illustrates the mathematical
equation of Boyle’s Law?
Assignment:
1. A massof gas occupies 1L at 1atm. At what pressure
does this gas occupy?
a. 2 liters
b. 0.5 liters
2. A sample of hydrogen has a volume of 25L. Under a
pressure of 5 atm, what will be the pressure of this gas if the
volume were decreased to 5 L?
3. To compress nitrogen at 1 atm from 2.8 L to 2.50 L, what
must the new pressure be if the temperature is kept
constant?
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