Essay
Essay Unit 2 - Practical Scientific Procedures and Techniques
- Course
- Institution
Undertake calorimetry to understand cooling curves
[Show more]
Seller
Follow
charleymcclellan
Content preview
Paraffin wax cooling curve experimentCharley McClellan
Group L
Pass
This is a report in the analysis and evaluation of determining the rate of cooling of paraffin
wax, written by Charley McClellan, a technical assistant at Chemcalequip.
Purpose
The aim of this experiment was to determine the patterns of cooling for 2 different
substances.
Hypothesis
I predict from the cooling curve that the temperature will rapidly decrease and then it will
reach a point of equilibrium and level out for a certain period due to changing state from a
liquid to a solid(freezing ) and then continue to drop steadily due to the continual cooling and
then will continue to decrease slowly when it is a solid.
Equipment used
● Clamp
● Thermometer
● Boiling tube
● Paraffin wax
● Beaker
● Warm water
Method
1. Melt the wax via the hot water bath and then remove the boiling tube from the water
via the clamp stand arrangement
2. Measure the temperature of the wax and observe the rising value
3. Once the temperature of the molten wax has stopped rising, start the clock. Let the
wax cool within the boiling tube (held by the clamp stand)
4. Take temperature readings every minute from around 75℃ (the starting
temperature.)
Data table
The results that were accurately obtained from following the procedure in the method above
were carefully recorded on a table of results. The recordings were accurate whereby the
temperature of the stearic acid decreased per minute. This means that the cooling Curve
that was drawn from these results would give a correct conclusion.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller charleymcclellan. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.68. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79976 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now