Other
Unit 2 assignment 2 - Lab Report on Study of Cooling curves
- Institution
- University Of East London (UEL)
Unit 2 assignment 2 - Lab Report on Study of Cooling curves
[Show more]
Content preview
Unit 2 assignment 2 - Lab Report on Study of Cooling curvesEssential Chemistry (University of East London)
, SATABDI MORSED 25201308 UNIT 2 Assignment 2
STUDY OF COOLING CURVES:
A cooling graphically shows the change in state of substances from liquid to solid.
Aim:
• To find out the accuracy of the thermometers.
• To study the cooling curve of paraffin wax.
• To study the cooling curve of stearic acid and its rate of cooling.
Calibration of thermometers:
Equipment:
• Boiling hot water.
• Ice.
• Alcohol thermometer
• Digital thermometer.
• Timer.
• Beakers
Risk assessment:
• There was a risk of burns from the boiling hot water. This was prevented by wearing lab coats and
also taking care while using the hot water.
• In case any burns had occurred during the experiment, the injured person would have
splashed water on the injured part, and also medical attention would have been provided to
the parson.
• There was also a risk of cuts in case the glass equipment broke, this was prevented by wearing lab
coats and goggles.
• In case there were any breaks, the tutor in charge was immediately informed in order to prevent
the risk of cuts. If cuts had occurred during the practical, medical attention would have been
provided
to the injured person.
Method:
Using ice:
1) A beaker was filled with ice cubes, and then some water was put in the beaker.
2) The water was stirred and left to sit for 3 minutes.
3) The ice was stirred again, and then thermometers (digital and alcohol) was placed in it.
O
4) After 3 minutes, the reading on the thermometer was O C.This reading was recorded of results,
and the thermometer was offset.
Using boiling hot water:
1) A beaker of water was boiled.
2) Once it was boiled, the thermometers (digital and alcohol) were both put in the water. No part of
the beaker was touched.
3) After 3 minutes, the readings on the thermometers were read and recorded on a table of results.
, Results from the calibration of the two thermometers:
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 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 AcademicAssignments. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £4.45. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
64438 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now