Name(s):______Haley Bockelman_____ CHM 1020 W7
Week 7 Assignment
A. Watch Boyle’s Law and answer questions pertaining to it:
https://www.youtube.com/watch?v=N5xft2fIqQU
1. In this demonstration, did the volume of the balloon increase or decrease when the
vacuum was applied?
2. The volume of the balloon increased and expanded when the vacuum was pumping the
air out of the jar to try and equalize the pressure and when the vacuum was released
3. What properties of gas are being demonstrated in this experiment? What kind of
relationship do they have?
The volume and pressure are inversely related
4. In this demonstration, did the volume of the marshmallow peep increase or decrease
when vacuum was applied? Explain your answer.
The volume increased because the pressure outside the peep became lower than the
pressure inside
5. Why does the volume of the shaving cream increase when Pressure is dropped (or
lowered)?
The volume of the shaving cream increased when the pressure was lowered because it
expands to try to equalize the pressure inside.
B. Watch both demonstrations of Charles Law and answer questions pertaining to them.
(1) https://www.youtube.com/watch?v=Gi5wPnkBEYI
(2) https://www.youtube.com/watch?v=5M8GR6_zIps
1. In the first demonstration (Video 1), what chemical (poured on the outside of the
balloon) was used to demonstrate the Charles law. Why was it used?
Liquid nitrogen was used to cool the air that was trapped inside the balloon so that the
volume of the pressure inside and outside the balloon equalize
2. In the second demonstration what pressure was used to demonstrate Charles law?
Atmospheric pressure
3. In the second demonstration, why did the water rise in the flask after it was inverted
into the beaker filled with water?
The water rose because the air inside the flask expanded while it was being heated.
When the flask was submerged into the water while gas cooling the atmospheric
pressure pushed the water into the flask until the temperature of the gas was the same
as the water in the beaker
4. In the second demonstration, how much water was collected in the flask that was
inverted into the beaker filled with water?
26.5mL
, Name(s):______Haley Bockelman_____ CHM 1020 W7
C. Watch the demonstration of Gay-Lussac’s Law and answer questions pertaining to it:
https://www.youtube.com/watch?v=1pVVZGOBIVg
1. When the Gay Lussac’s device was inserted in boiling water, what was the pressure that
was recorded?
948mm Hg
2. What happened to the pressure of the gas in the Gay Lussac’s apparatus when it was
dipped in mixed water bath (regular water + boiling water)? Did it increase or decrease?
The pressure decreased to 838 mmHg
3. In this experiment which of the following relationships are being tested?
a. Relationship between Volume and Temperature
b. Relationship between Volume and Pressure
c. Relationship between Pressure and Temperature
D. Watch the demonstration of Boiling water until it freezes under vacuum:
https://www.youtube.com/watch?v=y4BGV7-1lhs
1. In this video demonstration, which of the following variables were lowered (or
changed) to get water to boil?
a. Volume
b. Pressure
c. Temperature
2. When pressure dropped did the boiling point of water increase or decrease?
decrease
3. Did the water freeze in this demonstration and if it did at what temperature did it
freeze?
Yes, 0 degrees celsius
4. If the temperature increases, does the water vapor pressure increase or decrease?
increase
5. In this (the first) demonstration, at what pressure did the ice crystals start to form in
the beaker (i.e. slushy liquid))?
4 millimeters
6. In this demonstration as soon as vacuum was applied, bubbles were first visible that
left the beaker. What molecules were escaping water? gas
7. In the second experiment what molecule was added to water to make water boil
smoothly after Calcite did not work?
Week 7 Assignment
A. Watch Boyle’s Law and answer questions pertaining to it:
https://www.youtube.com/watch?v=N5xft2fIqQU
1. In this demonstration, did the volume of the balloon increase or decrease when the
vacuum was applied?
2. The volume of the balloon increased and expanded when the vacuum was pumping the
air out of the jar to try and equalize the pressure and when the vacuum was released
3. What properties of gas are being demonstrated in this experiment? What kind of
relationship do they have?
The volume and pressure are inversely related
4. In this demonstration, did the volume of the marshmallow peep increase or decrease
when vacuum was applied? Explain your answer.
The volume increased because the pressure outside the peep became lower than the
pressure inside
5. Why does the volume of the shaving cream increase when Pressure is dropped (or
lowered)?
The volume of the shaving cream increased when the pressure was lowered because it
expands to try to equalize the pressure inside.
B. Watch both demonstrations of Charles Law and answer questions pertaining to them.
(1) https://www.youtube.com/watch?v=Gi5wPnkBEYI
(2) https://www.youtube.com/watch?v=5M8GR6_zIps
1. In the first demonstration (Video 1), what chemical (poured on the outside of the
balloon) was used to demonstrate the Charles law. Why was it used?
Liquid nitrogen was used to cool the air that was trapped inside the balloon so that the
volume of the pressure inside and outside the balloon equalize
2. In the second demonstration what pressure was used to demonstrate Charles law?
Atmospheric pressure
3. In the second demonstration, why did the water rise in the flask after it was inverted
into the beaker filled with water?
The water rose because the air inside the flask expanded while it was being heated.
When the flask was submerged into the water while gas cooling the atmospheric
pressure pushed the water into the flask until the temperature of the gas was the same
as the water in the beaker
4. In the second demonstration, how much water was collected in the flask that was
inverted into the beaker filled with water?
26.5mL
, Name(s):______Haley Bockelman_____ CHM 1020 W7
C. Watch the demonstration of Gay-Lussac’s Law and answer questions pertaining to it:
https://www.youtube.com/watch?v=1pVVZGOBIVg
1. When the Gay Lussac’s device was inserted in boiling water, what was the pressure that
was recorded?
948mm Hg
2. What happened to the pressure of the gas in the Gay Lussac’s apparatus when it was
dipped in mixed water bath (regular water + boiling water)? Did it increase or decrease?
The pressure decreased to 838 mmHg
3. In this experiment which of the following relationships are being tested?
a. Relationship between Volume and Temperature
b. Relationship between Volume and Pressure
c. Relationship between Pressure and Temperature
D. Watch the demonstration of Boiling water until it freezes under vacuum:
https://www.youtube.com/watch?v=y4BGV7-1lhs
1. In this video demonstration, which of the following variables were lowered (or
changed) to get water to boil?
a. Volume
b. Pressure
c. Temperature
2. When pressure dropped did the boiling point of water increase or decrease?
decrease
3. Did the water freeze in this demonstration and if it did at what temperature did it
freeze?
Yes, 0 degrees celsius
4. If the temperature increases, does the water vapor pressure increase or decrease?
increase
5. In this (the first) demonstration, at what pressure did the ice crystals start to form in
the beaker (i.e. slushy liquid))?
4 millimeters
6. In this demonstration as soon as vacuum was applied, bubbles were first visible that
left the beaker. What molecules were escaping water? gas
7. In the second experiment what molecule was added to water to make water boil
smoothly after Calcite did not work?
