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TGS - Specific Heat Capacity RP Questions JBI

Last updated about 5 years ago

10 questions

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Question 1

1.

Method and notes
1. Choose your material, for example, a steel block, and measure its mass, in kilograms, then wrap the block in insulation
2. Measure the starting temperature of the block
3. Put a heater in the larger hole in the block. Connect the ammeter, power pack and heater in series
4. Connect the voltmeter across the power pack
This needs to be in parallel (piggy backed on)
5. Switch the power pack to 7 V and switch it on. Start the stopwatch as you turn on the power pack
6. Record the ammeter and voltmeter readings. These may vary slightly during the experiment, but not significantly
7. Calculate the power by using the equation power = current x time
7. Record the temperature every minute in your results table
8. After 10 minutes, turn off the power pack
9. Calculate the temperature change for each result
10. Calculate the energy transferred to the block
11. Calculate the specific heat capacity by using the equation specific heat capacity = energy / (mass x temperature change)

Have you read the method?

Yes

No

Question 2

2.

Why is the block surrounded by insulation?

Question 3

3.

If you know the power of the immersion - which equation do you use to calculate the energy transferred to the block?

Question 4

4.

As part of this experiment you may need to use a voltmeter, how is a voltmeter connected in a circuit?

Question 5

5.

A student uses a stopwatch to record their time that measure in minutes and seconds - what is 3 minutes 15 seconds in seconds?

Question 6

6.

How can you rearrange the equations for specific heat capacity to calculate temperature change? (you can use the whiteboard if it's easier)

Question 7

7.

Why is the hole with the thermometer in it filled with water (or sometimes oil)

Question 8

8.

In this practical a thermometer and time was used and a reading taken every minute. An alternative would be a data logger - give 2 advantages of using a data logger

Question 9

9.

When the student drew a graph the first part of the graph was a curve and then became a straight line - suggest why the first part was a curve

Question 10

10.

If the heating element is not in contact with the metal block there will be a layer of air between the heating element and the metal block. The calculated specific heat capacity may then be greater - explain why