18
Where does the heat go?
Subject: Physics
Sensor: Temperature
Aim:
This investigation is designed to show what happens to the heat (energy) from a liquid when it cools.
Overview:
It is designed to show that objects cool or warm to the temperature of their surroundings. It is also a good introduction to making a prediction to an
investigation. Students can predict what will happen to the two temperatures if left for a long period of time.
Note: This experiment is shown with an additional temperature sensor being used. However, by using the ‘Overlay’ function in the datalogging
software it can be performed with a single sensor.
Equipment required:
LogIT Black Box
2 Temperature sensors
Hot water (No hotter than 50
O
C), Cold water
2 containers - 1 large, 1 small
Tray and paper towels to catch spillage
Note: Make sure that the small container fits safely inside the larger one.
Hazards:
Students should be supervised at all times.
Ensure the datalogger cannot come into contact with water or damp.
Hot water above 55
O
C should be avoided as this can scold.
Always check your local regulations or the school advisory service such as CLEAPSS
or SSERC for guidance on the use of any hazardous material or source.
Setup:
1. Connect the temperature sensors to Black Box and connect Black Box to the computer.
2. Start the datalogging software and if necessary set the time span to at least 20 minutes.
3. Place the smaller container into the larger one.
Note: If using small containers, you might like to fix the smaller of the two containers to the bottom of the larger one using a piece of
modelling clay. Alternatively you could use a large stopper. This also aids in keeping the two containers insulated from each other.
