The apparatus was used to measure the enthalpy of combustion of ethanol - Scottish Highers Chemistry - Question 17 - 2023
Question 17
The apparatus was used to measure the enthalpy of combustion of ethanol.
the thermometer
copper can
100 cm³ water
Which of the following would not improve the ac... show full transcript
Worked Solution & Example Answer:The apparatus was used to measure the enthalpy of combustion of ethanol - Scottish Highers Chemistry - Question 17 - 2023
Step 1
Using a draught shield
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Using a draught shield can help improve accuracy by preventing heat loss due to air currents, thus maintaining a more stable temperature during the experiment.
Step 2
Moving the thermometer
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Moving the thermometer can help place it at the optimal position for accurate temperature measurement, often at the center of the water.
Step 3
Using a glass beaker instead of a copper can
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Using a glass beaker instead of a copper can would not improve accuracy; in fact, it may actually lead to less effective heat conduction, as copper is a better conductor.
Step 4
Stirring the water
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Stirring the water can help distribute heat evenly, ensuring a more accurate measurement of the temperature change. Thus, it is also a practice that improves accuracy.
Join the Scottish Highers students using SimpleStudy...
