11.3 Phase Change and Latent Heat
You have been tasked with designing a baking pan that will bake batter the fastest. There are four materials available for you to test.
- Four pans of similar design, consisting of aluminum, iron (steel), copper, and glass
- Oven or similar heating source
- Device for measuring high temperatures
- Balance for measuring mass
- Design a safe experiment to test the specific heat of each material (i.e., no extreme temperatures should be used)
- Write down the materials needed for your experiment and the procedure you will follow. Make sure that you include every detail, so that the experiment can be repeated by others.
- Carry out the experiment and record any data collected.
- Review your results and make a recommendation as to which metal should be used for the pan.
- What physical quantities do you need to measure to determine the specific heats for the different materials?
- How does the glass differ from the metals in terms of thermal properties?
- What are your sources of error?
Design, build, and refine a device that works within given constraints to convert one form of energy into another form of energy.
- The specific heat of aluminum is greatest, so that the aluminum pan will take longest to reach a given temperature. Copper has the lowest specific heat, and so will reach a given temperature fastest.
- Compare the time it takes for the glass pan and the aluminum pan to reach a specific temperature. Although their specific heats are comparable, the thermal conductivity is greater in aluminum, making it heat faster than the glass, which is an insulator.