EVERYTHING YOU RESEARCH NEEDS TO BE REFERENCED.
● An introduction to the assignment, what you will be looking at in your report (use
assignment brief context).
● Method of calibration of the following equipment and your results:Liquid alcohol
thermometer (ice and boiling water), temperature probe (ice and boiling water),
● What that calibration means for your results, what equipment will you use and why,
will you alter any results?
● Compare your calibration results with results (numbers) from other groups, which is
more accurate?
● Risk assessment for heating and cooling
● Method used for heating stearic acid including (mass of substance, how the cooling
will occur (in air/water – which is better), surface area of the containers, using a lid?
● Table of results including units and headings (results must show you heated the solid
to a safe temperature, it melted, you cooled, it solidified
● Hand draw a graph, labels and units, points plotted accurately (within ½ a little
square), a smooth curve through all the points
● Draw a tangent at the start, end and the midpoint where the gradient changes the
most, calculate the gradient of each tangent, add units
● Add on your graph your melting/freezing point and temperature
● Method used for heating paraffin wax including (mass of substance, how the cooling
will occur (in air/water – which is better), surface area of the containers, using a lid?
Could you change something to compare in your analysis/evaluation?
● Table of results including units and headings (results must show you heated the solid
to a safe temperature, it melted, you cooled, it solidified
● Hand draw a graph, labels and units, points plotted accurately (within ½ a little
square), a smooth curve through all the points
● Draw a tangent at the start, end and the midpoint where the gradient changes the
most, calculate the gradient of each tangent, add units
● Add on your graph your melting/freezing point and temperature
● What happens at a molecular level when a substance cools and freezes? Can you
relate this to your cooling curve? What part of your cooling curve (for both
substances) is where it freezes, how do you know?
● Describe your graph using mathematical terms (rapid increase, decrease,
approximately constant, etc.) and link to the molecular information above
● Compare your melting/freezing point to other groups (using numbers), if yours
accurate? Why/why not? What could have caused errors in your practical?
● Stearic acid and paraffin wax are different, stearic acid is a pure substance whereas
paraffin wax is a mixture, how would have this caused issues with your
melting/freezing point, comments on accuracy etc.
● Compare your melting/freezing point to literature values (remember to reference
where you got the information from), compare the shape of the graph to literature
values
● What specific parts to the practical could have caused errors and what would these
do to your results?
● If you were to redo the practical how would you change the METHOD to make it more
accurate, why would they increase the accuracy/reliability/repeatability/precision?
Justify the method steps you did to make your practical accurate
● An introduction to the assignment, what you will be looking at in your report (use
assignment brief context).
● Method of calibration of the following equipment and your results:Liquid alcohol
thermometer (ice and boiling water), temperature probe (ice and boiling water),
● What that calibration means for your results, what equipment will you use and why,
will you alter any results?
● Compare your calibration results with results (numbers) from other groups, which is
more accurate?
● Risk assessment for heating and cooling
● Method used for heating stearic acid including (mass of substance, how the cooling
will occur (in air/water – which is better), surface area of the containers, using a lid?
● Table of results including units and headings (results must show you heated the solid
to a safe temperature, it melted, you cooled, it solidified
● Hand draw a graph, labels and units, points plotted accurately (within ½ a little
square), a smooth curve through all the points
● Draw a tangent at the start, end and the midpoint where the gradient changes the
most, calculate the gradient of each tangent, add units
● Add on your graph your melting/freezing point and temperature
● Method used for heating paraffin wax including (mass of substance, how the cooling
will occur (in air/water – which is better), surface area of the containers, using a lid?
Could you change something to compare in your analysis/evaluation?
● Table of results including units and headings (results must show you heated the solid
to a safe temperature, it melted, you cooled, it solidified
● Hand draw a graph, labels and units, points plotted accurately (within ½ a little
square), a smooth curve through all the points
● Draw a tangent at the start, end and the midpoint where the gradient changes the
most, calculate the gradient of each tangent, add units
● Add on your graph your melting/freezing point and temperature
● What happens at a molecular level when a substance cools and freezes? Can you
relate this to your cooling curve? What part of your cooling curve (for both
substances) is where it freezes, how do you know?
● Describe your graph using mathematical terms (rapid increase, decrease,
approximately constant, etc.) and link to the molecular information above
● Compare your melting/freezing point to other groups (using numbers), if yours
accurate? Why/why not? What could have caused errors in your practical?
● Stearic acid and paraffin wax are different, stearic acid is a pure substance whereas
paraffin wax is a mixture, how would have this caused issues with your
melting/freezing point, comments on accuracy etc.
● Compare your melting/freezing point to literature values (remember to reference
where you got the information from), compare the shape of the graph to literature
values
● What specific parts to the practical could have caused errors and what would these
do to your results?
● If you were to redo the practical how would you change the METHOD to make it more
accurate, why would they increase the accuracy/reliability/repeatability/precision?
Justify the method steps you did to make your practical accurate
