Describe on the experimental treatment by which you can obtain the initial temperature of the unknown metal at 100.0 °C. How do you think you can prepare this metal at 100.0 C before you put it in the styrofoam cup calorimeter. Describe your experimental method in detail.
If you use pure water and the atomospheric pressure is 1 atmosphere, the water will boil at 100 C. Place the metal in the water and let it stay there with the water boiling for a few minutes. It will be at the same temperature as the water.
To obtain the initial temperature of the unknown metal at 100.0 °C before placing it in the styrofoam cup calorimeter, you can use the following experimental method:
1. Equipment and materials needed:
- Unknown metal sample
- Heat source (e.g., Bunsen burner or electric hot plate)
- Thermometer
- Styrofoam cup calorimeter
- Tongs or heat-resistant gloves
- Stopwatch or timer
2. Preparing the metal sample at 100.0 °C:
a. Start by measuring the mass of the unknown metal sample accurately using a balance.
b. Place the metal sample on a heat-resistant surface.
c. Set up the heat source (e.g., Bunsen burner or electric hot plate) under the metal sample.
d. Turn on the heat source and adjust it to a medium-high heat level.
e. Monitor the metal sample closely and check its temperature using a thermometer until it reaches 100.0 °C. Make sure to stir or move the metal occasionally to ensure even heating.
f. Once the metal sample reaches the desired temperature, turn off the heat source.
Note: The actual heating process will depend on various factors such as the size, shape, and composition of the metal sample. Adjustments to the experimental method may be necessary based on the properties of the metal and the equipment available.
3. Transferring the metal sample to the styrofoam cup calorimeter:
a. Quickly transfer the metal sample from the heat source to the styrofoam cup calorimeter using tongs or heat-resistant gloves to minimize heat loss.
b. Carefully place the metal sample into the calorimeter, ensuring it is fully submerged.
c. Immediately begin recording the time using a stopwatch or timer to keep track of the duration of the experiment.
By following this experimental method, you can prepare the unknown metal at the desired temperature of 100.0 °C before inserting it into the styrofoam cup calorimeter. It is crucial to handle the metal sample and equipment with caution and follow appropriate safety procedures, such as wearing protective equipment and working in a well-ventilated area if using a heat source.