Download GRAPH Melting of Paradichlorobenzene

Name: ___________________________________
Class: ___________ Date: ____________________
Time and Temperature of Paradichlorobenzene
A student would like to discover
the melting point of solid
paradichlorobenzene. Under
careful lab conditions, he places a
sample in a test tube at 30 °C and
carefully heats it in a hot water
bath, measuring the temperature
of the sample over time until the
temperature reached 60 °C. He
recorded the times and temperatures on the
right. Paradichlorobenzene is a dangerous
carcinogen, so fortunately the student did
take many precautions and followed his
teacher’s instructions for his laboratory
experiment. The one thing he forgot to do
was to observe when melting occurred!
Graphing Every
Week
Answer the questions below.
1. What is the title for this graph?
2. What is the independent variable in this
study?
3. What is the dependent variable?
6. Write a short caption with a claim that explains
a trend in your graph or summarizes the findings in
this experiment. Make sure you point out specific
pieces of evidence and explain why they support
your claim.
4. What phase change occurred during this
experiment?
5. Using the internet, look up the melting point and
boiling point of paradichlorobenzene. Write them
below.
Data adapted from: https://pubchem.ncbi.nlm.nih.gov/compound/1_4-Dichlorobenzene#section=Boiling-Point
© Bethany Lau, Science with Mrs. Lau, LLC
Name: ___________________________________
Class: ___________ Date: ____________________
Time and Temperature of Paradichlorobenzene
A student would like to discover
the melting point of solid
paradichlorobenzene. Under
careful lab conditions, he places a
sample in a test tube at 30 °C and
carefully heats it in a hot water
bath, measuring the temperature
of the sample over time until the
temperature reached 60 °C. He
recorded the times and temperatures on the
right. Paradichlorobenzene is a dangerous
carcinogen, so fortunately the student did
take many precautions and followed his
teacher’s instructions for his laboratory
experiment. The one thing he forgot to do
was to observe when melting occurred!
Graphing Every
Week
Answer the questions below.
1. Write an appropriate title for this
graph.
2. What is the independent variable in this
study?
3. What is/are the dependent variable(s)?
5. Write a short caption with a claim that explains
a trend in your graph or summarizes the findings in
this experiment. Make sure you point out specific
pieces of evidence and explain why they support
your claim.
4. Using the internet, look up the melting point
and boiling point of paradichlorobenzene. Write
them below. Could the student have continued
this same experiment to determine the boiling
point experimentally? Why or why not?
Data adapted from: https://pubchem.ncbi.nlm.nih.gov/compound/1_4-Dichlorobenzene#section=Boiling-Point
© Bethany Lau, Science with Mrs. Lau, LLC
Name: ___________________________________
Class: ___________ Date: ____________________
Time and Temperature of Paradichlorobenzene
A student would like to
discover the melting point of
solid paradichlorobenzene.
Under careful lab conditions,
he places a sample in a test
tube at 30 °C and carefully
heats it in a hot water bath,
measuring the temperature
of the sample over time until
the temperature reached 60
°C. He recorded the times
and temperatures on the
right. Paradichlorobenzene
is a dangerous carcinogen, so fortunately
the student did take many precautions and
followed his teacher’s instructions for his
laboratory experiment. The one thing he
forgot to do was to observe when melting
occurred!
Create your graph in the space on the next
page based on the data in the table. Make
sure you include all necessary elements of a
graph.
Time (seconds)
Temperature (C)
0
30
30
35
60
40
90
45
120
50
150
53
180
53
210
53
240
55
270
57
300
60
Graphing Every
Week
Check your work! Did you include a title,
labels, units, and legend (if needed)?
Then answer the questions below.
1. What is the independent variable in this
study?
3. Write a short caption with a claim that explains a
trend in your graph or summarizes the findings in this
experiment. Make sure you point out specific pieces of
evidence and explain why they support your claim.
2. What is the dependent variable in this
study?
Data adapted from: https://pubchem.ncbi.nlm.nih.gov/compound/1_4-Dichlorobenzene#section=Boiling-Point
© Bethany Lau, Science with Mrs. Lau, LLC
Name: ___________________________________
Class: ___________ Date: ____________________
Time and Temperature of Paradichlorobenzene
Data adapted from: https://pubchem.ncbi.nlm.nih.gov/compound/1_4-Dichlorobenzene#section=Boiling-Point
© Bethany Lau, Science with Mrs. Lau, LLC
Graphing Every
Week
Name: ___________________________________
Class: ___________ Date: ____________________
Time and Temperature of Paradichlorobenzene
Data adapted from: https://pubchem.ncbi.nlm.nih.gov/compound/1_4-Dichlorobenzene#section=Boiling-Point
© Bethany Lau, Science with Mrs. Lau, LLC
Graphing Every
Week
Answer Key
Name: ___________________________________
Class: ___________ Date: ____________________
Time and Temperature of Paradichlorobenzene
A student would like to discover
the melting point of solid
paradichlorobenzene. Under
careful lab conditions, he places a
sample in a test tube at 30 °C and
carefully heats it in a hot water
bath, measuring the temperature
of the sample over time until the
temperature reached 60 °C. He
recorded the times and temperatures on the
right. Paradichlorobenzene is a dangerous
carcinogen, so fortunately the student did
take many precautions and followed his
teacher’s instructions for his laboratory
experiment. The one thing he forgot to do
was to observe when melting occurred!
Graphing Every
Week
Answer the questions below.
1. What is the title for this graph?
Temperature over Time during
Heating of Paradichlorobenzene
2. What is the independent variable in this
study?
Time
3. What is the dependent variable?
Temperature
4. What phase change occurred during this
experiment?
solid to liquid
5. Using the internet, look up the melting point and
boiling point of paradichlorobenzene. Write them
below.
6. Write a short caption with a claim that explains
a trend in your graph or summarizes the findings in
this experiment. Make sure you point out specific
pieces of evidence and explain why they support
your claim.
As the sample was heated over time, the
temperature rose. The temperature “paused”
rising at 53 °C; this is the melting point for
paradichlorobenzene.
Melting point: 53 °C
Boiling point: 174 °C
Data adapted from: https://pubchem.ncbi.nlm.nih.gov/compound/1_4-Dichlorobenzene#section=Boiling-Point
© Bethany Lau, Science with Mrs. Lau, LLC
Answer Key
Name: ___________________________________
Class: ___________ Date: ____________________
Time and Temperature of Paradichlorobenzene
A student would like to discover
the melting point of solid
paradichlorobenzene. Under
careful lab conditions, he places a
sample in a test tube at 30 °C and
carefully heats it in a hot water
bath, measuring the temperature
of the sample over time until the
temperature reached 60 °C. He
recorded the times and temperatures on the
right. Paradichlorobenzene is a dangerous
carcinogen, so fortunately the student did
take many precautions and followed his
teacher’s instructions for his laboratory
experiment. The one thing he forgot to do
was to observe when melting occurred!
Graphing Every
Week
Answer the questions below.
1. Write an appropriate title for this
graph.
Temperature over Time during
Heating of Paradichlorobenzene
2. What is the independent variable in this
study?
Time
3. What is/are the dependent variable(s)?
Temperature
4. Using the internet, look up the melting point
and boiling point of paradichlorobenzene. Write
them below. Could the student have continued
this same experiment to determine the boiling
point experimentally? Why or why not?
The melting point is 53 °C. The boiling
5. Write a short caption with a claim that explains
a trend in your graph or summarizes the findings in
this experiment. Make sure you point out specific
pieces of evidence and explain why they support
your claim.
As the sample was heated over time, the
temperature rose. The temperature “paused”
rising at 53 °C; this is the melting point for
paradichlorobenzene.
point is 174 °C. The student could not
use a hot water bath; the water would
boil at 100 °C
Data adapted from: https://pubchem.ncbi.nlm.nih.gov/compound/1_4-Dichlorobenzene#section=Boiling-Point
© Bethany Lau, Science with Mrs. Lau, LLC
Answer Key
Name: ___________________________________
Class: ___________ Date: ____________________
Time and Temperature of Paradichlorobenzene
A student would like to
discover the melting point of
solid paradichlorobenzene.
Under careful lab conditions,
he places a sample in a test
tube at 30 °C and carefully
heats it in a hot water bath,
measuring the temperature
of the sample over time until
the temperature reached 60
°C. He recorded the times
and temperatures on the
right. Paradichlorobenzene
is a dangerous carcinogen, so fortunately
the student did take many precautions and
followed his teacher’s instructions for his
laboratory experiment. The one thing he
forgot to do was to observe when melting
occurred!
Create your graph in the space on the next
page based on the data in the table. Make
sure you include all necessary elements of a
graph.
Time (seconds)
Temperature (C)
0
30
30
35
60
40
90
45
120
50
150
53
180
53
210
53
240
55
270
57
300
60
Graphing Every
Week
Check your work! Did you include a title,
labels, units, and legend (if needed)?
Then answer the questions below.
1. What is the independent variable in this
study?
Time
2. What is the dependent variable in this
study?
Temperature
3. Write a short caption with a claim that explains a
trend in your graph or summarizes the findings in this
experiment. Make sure you point out specific pieces of
evidence and explain why they support your claim.
As the sample was heated over time, the
temperature rose. The temperature “paused”
rising at 53 °C; this is the melting point for
paradichlorobenzene.
Data adapted from: https://pubchem.ncbi.nlm.nih.gov/compound/1_4-Dichlorobenzene#section=Boiling-Point
© Bethany Lau, Science with Mrs. Lau, LLC
Answer Key
Name: ___________________________________
Class: ___________ Date: ____________________
Time and Temperature of Paradichlorobenzene
Data adapted from: https://pubchem.ncbi.nlm.nih.gov/compound/1_4-Dichlorobenzene#section=Boiling-Point
© Bethany Lau, Science with Mrs. Lau, LLC
Graphing Every
Week