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Laboratory Exercise Week 9-12
Solutions
1.
The relationship demonstrated by the graph above is a directly proportion relationship.
Charles law states that if a given quantity of gas is held at a constant pressure, its volume
is directly proportional to the absolute temperature. Hence, as the temperature of the gas
increases, the gas molecule will begin to move around more quickly and hit the walls of
the container with more force thus, the volume will increase.
2.
0
5
10
15
20
25
30
35
40
45
50
0 100 200 300 400 500
Volume (mL)
Temperature (K)
Graph of Volume against Temperature (K)
y = 22.496x
-1.049
R² = 0.9991
0
5
10
15
20
25
30
0 0.5 1 1.5 2 2.5
Volume (L)
Pressure (atm)
Graph of Volume against Pressure

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Boyles Law states that the volume of the gas is inversely proportional to the pressure
exerted by the gas.
Pressure Vs. Inverse of volume
Boyles law states that the inverse volume of the gas is directly proportional to the
pressure.
3. PV = nRT
(4)(V) = (100)(0.0826)(30+273)
4V = 2502.78
V = 625.70 liters
4. A. The can contains an amount of isobutane gas at a constant volume, so if the temperature
is increased by heating, the pressure will increase proportionately. High temperature could
lead to high pressure, causing the can to burst.
B.
𝑃1𝑉1
𝑇1
=
𝑃2𝑉2
𝑇2
Constant volume, thus the final equation is
𝑃1
𝑇1
=
𝑃2
𝑇2
Substituting into the equation, the temperature is changed into Kelvin by adding +273K
to the degree Celsius, therefore;
360
297
=
𝑃 2
278
P
2
= 336.96KPa
y = 0.048x - 0.0039
R² = 0.9983
0
0.02
0.04
0.06
0.08
0.1
0.12
0 0.5 1 1.5 2 2.5
1/volume (L)
Pressure (atm)
Graph of 1/volume againts Pressure

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Laboratory Exercise Week 9-12 Solutions 1. Graph of Volume against Temperature (K) 50 45 Volume (mL) 40 35 30 25 20 15 10 5 0 0 100 200 300 400 500 Temperature (K) The relationship demonstrated by the graph above is a directly proportion relationship. Charles law states that if a given quantity of gas is held at a constant pressure, its volume is directly proportional to the absolute temperature. Hence, as the temperature of the gas increases, the gas molecule will begin to move around more quickly and hit the walls of the container with more force thus, the volume will increase. 2. Graph of Volume against Pressure 30 Volume (L) 25 y = 22.496x-1.049 R² = 0.9991 20 15 10 5 0 0 0.5 1 1.5 Pressure (atm) 2 2.5 Boyles Law states that the volume of the gas is inversely proportional to the pressure exerted by the gas. Pressure Vs. Inverse of volume Graph of 1/volume againts Pressure 0.12 0.1 1/volume (L) 0.08 0.06 y = 0.048x - 0.0039 R² = 0.9983 0.04 0.02 0 0 0.5 1 1.5 2 2.5 Pressure (atm) Boyles law states that the inverse volume of the gas is directly proportional to the pressure. 3. PV = nRT (4)(V) = (100)(0.0826)(30+273) 4V = 2502.78 V = 625.70 liters 4. A. The can contains an amount of isobutane gas at a constant volume, so if the temperature is increased by heating, the pressure will increase proportionately. High temperature could lead to high pressure, causing the can to burst. B. 𝑃1𝑉1⁄𝑇1 = 𝑃2𝑉2⁄𝑇2 Constant volume, thus ...
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