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A student carried out an experiment to obtain the calibration curve of a thermometer - Leaving Cert Physics - Question 3 - 2007
Question 3
A student carried out an experiment to obtain the calibration curve of a thermometer. The following is an extract from her report. I placed the thermometer I was ca... show full transcript
Worked Solution & Example Answer:A student carried out an experiment to obtain the calibration curve of a thermometer - Leaving Cert Physics - Question 3 - 2007
Step 1
Draw a labelled diagram of the apparatus used in the experiment.
Answer
To create the labelled diagram, include the following components:
- Beaker of water: where the calibration will take place.
- Mercury thermometer: used as the standard for comparison.
- Uncalibrated thermometer: the thermometer being tested.
- Heat source: to maintain the water at various temperatures (like a Bunsen burner or hot plate).
- Means of recording thermometric property: such as a written log or a digital recorder.
- Detail to improve accuracy: for example, the use of a stirrer to ensure even temperature distribution.
Step 2
Using the data in the table, draw a graph on graph paper of the value of the thermometric property against its temperature. Put the temperature on the horizontal axis (X-axis).
Answer
- Label the axes: The X-axis represents the temperature (°C), and the Y-axis represents the value of the thermometric property.
- Plot the data points: Using the provided data, the points are:
- (0, 4)
- (20, 12)
- (40, 24)
- (60, 40)
- (80, 64)
- (100, 150)
- Draw smooth curves or lines connecting the points to represent the calibration curve of the thermometer.
Step 3
Use your graph to estimate the temperature when the value of the thermometric property is 50.
Answer
From the graph, locate the point where the Y-value corresponds to 50. By drawing a horizontal line from 50 on the Y-axis until it intersects with the graph, from that intersection, draw a vertical line down to the X-axis to read the corresponding temperature value. This temperature is approximately between 70°C and 72°C.
Step 4
Step 5