Heat Capacity of An Unknown Metal
Purpose:
The purpose of performing this lab was to find the specific heat capacity of an unknown metal.
Hypothesis:
Since all metals have different densities and makeups I think that the heat capacity will greatly vary. The makeup of iron is very different than aluminum so the heat capacity will be quite different. Also, a lot of metals are not completely pure and that will also have some effect on the heat capacity.
Materials:
-Hot Plate
-Two (2) Beakers
-Water
-Metal Objects
-Two (2) Thermometers
-Pencil
-Paper
-Calculator
Design:
A hot plate is acquired and plugged in and if left to warm up. Fill two beakers with 0.075kg of water and record the temperature using a thermometer and record it. Place one of the beakers onto the hot plate and drop one of the metal objects in. Wait for the water to boil and wait two minutes. Take the object out of the water and drop it into the other beaker. Take the temperature of the beaker and record the rise in temperature.
Repeat this exact process for how ever many objects you have to test.
Procedure:
1. Plug in the hot plate
2. Fill two beakers with 0.075kg of water
3. Select your metal objects
4. Record the starting temperature of the water
5. Place a beaker onto the hot plate and drop a metal object in
6. Wait until the water boils and record the temperature to make sure that it is 100 degrees
7. Wait two minutes
8. Remove the metal object from the first beaker and insert it into the second one.
9. Record the change in temperature after the object has been placed into the water.
10. Repeat this exact process for how ever many objects you have to test.
Observations:
In this lab I observed that the temperature ...
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... possible was our thermometer that was used to measure the cold water temperature change. When it was set down for all of our experiments it was put near the hot plate which was making the counter quite hot. This could have given some skewed readings when it was used to measure the temperature. As stated in the hypothesis it was thought that all of the metals have a different makeup so the heat capacity was going to vary between metals. The findings in this lab prove this to be true. So if one is trying to determine what an unknown metal is made up of, this experiment would be an adequate solution. Once you find your values, compare them to a thermal conductivity chart and compare to find the metal. Based on the data collected throughout the lab, I can conclude that my hypothesis was correct. A metals heat capacity is determined by the makeup and density of a metal.
Thermodynamics is essentially how heat energy transfers from one substance to another. In “Joe Science vs. the Water Heater,” the temperature of water in a water heater must be found without measuring the water directly from the water heater. This problem was translated to the lab by providing heated water, fish bowl thermometers, styrofoam cups, and all other instruments found in the lab. The thermometer only reaches 45 degrees celsius; therefore, thermodynamic equations need to be applied in order to find the original temperature of the hot water. We also had access to deionized water that was approximately room temperature.
Start with the hot water and first measure the temperature. Record it. 8. Then pour 40 ml into the beaker. You can measure how much water was used by looking at the meniscus.
The purpose of this lab was to calculate the specific heat of a metal cylinder
A characteristic property can help identify a substance. A characteristic property will never change even when the volume of a substance is varied. A characteristic property also does not change when a substance changes state in matter. A physical property cannot identify a substance. A physical property will change when the volume of a substance is varied. It can also change when the substance changes state in matter. For example, if the volume and mass of a substance changes then the physical appearance will also change. However, the density, which is a characteristic property, will not change at all. The boiling point of a substance is the temperature that a substance changes from a liquid to a gas. The boiling point of a substance is a characteristic property because the boiling point of a substance will never change even when the volume and mass changes. The only thing that will change is the time that it takes to reach that temperature. If the mass and volume of the substance is small, then it will take a small amount of time for the substance to reach the temperature. However if the mass and volume of the substance is larger, then it will take a longer time to reach the temperature. The purpose of this lab was to see if when the volume of a substance changes so does the boiling point.
3. Why are the crucible and lid heated at the beginning of the experiment before being weighed?
6. Place the test tube in the beaker. Secure the test tube and thermometer to the retort stand using clamps. Begin heating the water bath gently.
A thermometer * A clamp * A Bunsen burner * A stop clock Method = =
on how long it takes to heat up. If we heat a large volume of water it
water has risen to 60°c I will then put the lid on the spirit burner
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ball in the beaker. I heated it up to 50°C, when the ball was at the
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