Photo AI
An experiment was set up to establish the calibration curve of a thermometer - Leaving Cert Physics - Question 2 - 2018
Question 2
An experiment was set up to establish the calibration curve of a thermometer. (i) Draw a labelled diagram of the apparatus used in this experiment. (ii) What measu... show full transcript
Worked Solution & Example Answer:An experiment was set up to establish the calibration curve of a thermometer - Leaving Cert Physics - Question 2 - 2018
Step 1
Draw a labelled diagram of the apparatus used in this experiment.
Answer
To draw a labelled diagram, begin with the following components:
- Beaker of Water: Represent this as a simple rectangle for the beaker with a water level indicator.
- Thermometers: Include both the standard and uncalibrated thermometers, labeling them accordingly.
- Heat Source: Draw a burner or similar heat source under the beaker.
- Stirrer: Optionally include a stirrer to show how it is used to ensure uniform temperature in the water.
Make sure to label each part clearly and consider adding arrows to indicate the flow of heat.
Step 2
What measurements were taken during this experiment?
Answer
In this experiment, the following measurements were taken:
- Thermometric Property: Measurement of the variable being tested (i.e., value indicated by the thermometer).
- Temperature: The ambient temperature at which the measurements were taken.
Additionally, one might use a thermometer or digital meter stick to observe these measurements, ensuring accuracy.
Step 3
Use the data in the table to draw a graph, on graph paper, to establish the calibration curve. Put temperature on the horizontal (X) axis.
Answer
To draw the graph of the calibration curve:
- Label Axes: The X-axis will represent the temperature (°C) while the Y-axis will represent the value of the thermometric property.
- Plot Points: Mark the data points based on the table:
- For (0, 0)
- For (20, 25)
- For (40, 60)
- For (60, 100)
- For (80, 150)
- For (100, 200)
- Connect Points: Draw lines between the points smoothly, indicating the trend of the calibration curve.
- Check Accuracy: Ensure that each point is accurately plotted, and if using graph paper, make sure to utilize precise measurement.
Step 4
Use your graph to determine the temperature when the value of the thermometric property is 75.
Answer
Using the graph, locate the value of 75 on the Y-axis and draw a horizontal line to intersect the calibration curve. From the point of intersection, extend a vertical line down to the X-axis to determine the corresponding temperature.
Based on the graph, when the value of the thermometric property is 75, the temperature is approximately 48°C.