Unit 2 assignment B Name: Mohammed Islam
Student ID: 16743567
Subject: Chemistry
Keeping up the standards:
Aim:
The main aim of this experiment was to obtain data using different equipment to construct cooling
curves and use cooling curves to determine the cooling rate of different substances.
Calibration of the digital thermometer:
The digital thermometer was calibrated by placing it into ice water, and recording the temperature.
This was then repeated twice so three readings could be obtained in order to work out an average.
The digital thermometer was then placed into boiling water, which was repeated three times, so we
could get an average for it.
Calibration of the spirit thermometer:
To calibrate the spirit thermometer, it was firstly placed into ice water and the temperature was
recorded. This was repeated again twice so we had three readings, and could work out an average.
The spirit thermometer was then placed into boiling water and like the ice water, three readings
were taken so we could take an average. The results were compared with the digital thermometer,
so we could decide which one would have been best to use.
The table shows that the spirit thermometer when put in ice water, is on average 0.1° above the
digital thermometer. In boiling water, the table also shows that the spirit thermometer measures
4.1° above the digital thermometer. Overall the table tells us that on average, the spirit
thermometer measures 2.1° above the digital thermometer, meaning that throughout all of the
readings taken using the spirit thermometer should have 2 degrees subtracted from them
throughout the experiment.
, Unit 2 assignment B Name: Mohammed Islam
Student ID: 16743567
Subject: Chemistry
In this practical we used the spirit thermometer as opposed to the digital thermometer because
there simply wasn’t enough digital thermometers for everyone to use. Using a digital thermometer
would of made the practical a lot more reliable as it is more accurate and there is less risk of human
errors.
Paraffin wax investigation:
Firstly, a 250ml glass beaker was filled with 200ml of cold water, and then placed on top of a tripod
and gauze which were set up on a heatproof mat. The Bunsen burner was placed directly
underneath the glass beaker and as soon as the gas tap had been turned on it was lit with a flame.
The cold water was heated until it was boiling.
Next, a boiling tube was filled with ¼ of paraffin wax and then it was attached to a clamp and stand
and lowered into the glass beaker filled with boiling water. The boiling tube filled with paraffin wax
was left in the boiling water until it had melted
Once the paraffin wax had melted, an initial temperature was taken and then the boiling tube was
taken out of the boiling water and took off the clamp and stand, and it was placed into a test tube
rack
The stopwatch was then started, and a temperature was taken with a spirit thermometer every 30
seconds until the wax had returned to room temperature.
Student ID: 16743567
Subject: Chemistry
Keeping up the standards:
Aim:
The main aim of this experiment was to obtain data using different equipment to construct cooling
curves and use cooling curves to determine the cooling rate of different substances.
Calibration of the digital thermometer:
The digital thermometer was calibrated by placing it into ice water, and recording the temperature.
This was then repeated twice so three readings could be obtained in order to work out an average.
The digital thermometer was then placed into boiling water, which was repeated three times, so we
could get an average for it.
Calibration of the spirit thermometer:
To calibrate the spirit thermometer, it was firstly placed into ice water and the temperature was
recorded. This was repeated again twice so we had three readings, and could work out an average.
The spirit thermometer was then placed into boiling water and like the ice water, three readings
were taken so we could take an average. The results were compared with the digital thermometer,
so we could decide which one would have been best to use.
The table shows that the spirit thermometer when put in ice water, is on average 0.1° above the
digital thermometer. In boiling water, the table also shows that the spirit thermometer measures
4.1° above the digital thermometer. Overall the table tells us that on average, the spirit
thermometer measures 2.1° above the digital thermometer, meaning that throughout all of the
readings taken using the spirit thermometer should have 2 degrees subtracted from them
throughout the experiment.
, Unit 2 assignment B Name: Mohammed Islam
Student ID: 16743567
Subject: Chemistry
In this practical we used the spirit thermometer as opposed to the digital thermometer because
there simply wasn’t enough digital thermometers for everyone to use. Using a digital thermometer
would of made the practical a lot more reliable as it is more accurate and there is less risk of human
errors.
Paraffin wax investigation:
Firstly, a 250ml glass beaker was filled with 200ml of cold water, and then placed on top of a tripod
and gauze which were set up on a heatproof mat. The Bunsen burner was placed directly
underneath the glass beaker and as soon as the gas tap had been turned on it was lit with a flame.
The cold water was heated until it was boiling.
Next, a boiling tube was filled with ¼ of paraffin wax and then it was attached to a clamp and stand
and lowered into the glass beaker filled with boiling water. The boiling tube filled with paraffin wax
was left in the boiling water until it had melted
Once the paraffin wax had melted, an initial temperature was taken and then the boiling tube was
taken out of the boiling water and took off the clamp and stand, and it was placed into a test tube
rack
The stopwatch was then started, and a temperature was taken with a spirit thermometer every 30
seconds until the wax had returned to room temperature.
