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Answers Chem101l Lab 8

Content type
User Generated
Subject
Chemistry
Type
Homework
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Lab 8 Using the Ideal Gas Law CHEM101L
Student Name: Click here to enter text.
Access Code (located on the lid of your lab kit): Click here to enter text.
Pre-Lab Quesons:
1. Write the balanced equaon for the decomposion of hydrogen peroxide.
𝟐 𝐇
𝟐
𝐎
𝟐(𝐚𝐪)
→ 𝐎
𝟐(𝐠)
+ 𝟐 𝐇
𝟐
𝐎
(𝐥)
2. According to Charles’s law, what is the relaonship between temperature and pressure?
At a constant pressure, temperature of a gas is directly propotional to the volume of the fixed
mass of gas
3. Atmospheric pressure depends on the altude (or height) of your locaon. How should the air
pressure change if you were in Denver, Colorado, which is 1.5 kilometers (1 mile) above sea level?
Atmospheric pressure at 1.5 km above from the sea level is lower than the atmospheric
pressure at the sea level
4. Considering that catalysts are not consumed in a reacon, how do you think increasing the amount of
catalyst would aect the reacon rate for the decomposion of hydrogen peroxide?
Catalysts contribute to lower the activaition energy of a reaction. Therefore, when increase
amount of catalyst, hydrogen decomposition will be increased (rate of the formation of bubles
will increased)
Experiment 1: Charles’s Law
Table 1 Temperature vs. Volume of Gas Data
Temperature Condions
Temperature (˚C)
Volume (mL)
Room Temperature
Click here to enter text.
Click here to enter text.
Hot Water
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Click here to enter text.
Ice Water
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Post-Lab Quesons
1. Use a pencil and graph paper to create a graph of temperature and volume data. Place temperature
on the x-axis (in Kelvin) and volume (mL) on the y-axis. Leave room on the le side of your chart for
temperature values below zero. You can also use a graphing program to create your graph. Using a ruler,

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Lab 8 Using the Ideal Gas Law CHEM101L
draw a straight line of best t through your data points, extrapolang the line unl it intersects the
(negave) x-axis.
2. Why can you assume a linear relaonship (a straight-lined slope)?
Because temperature is directly propotional to the volume, therefore graph is behave as y=mx
shape.
3. What happened to the volume of gas when the syringe was exposed to various temperature
condions? Using the concepts explored in the Introducon, describe why this occurred, keeping in
mind the denion of temperature.
When temperature increased, gas syringe tend to expand, hence it will shows the increment of
the current volume. When temperature of the syringe decreased, volume of the syringe tend to
shrink, therefore it shows reduction of the current volume in the syringe.
4. At what temperature does your line intersect the x-axis? What volume corresponds to this
temperature?
Click here to enter text.
Insert a photo of your completed lab setup with your name and access code handwrien in the
background:

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