Physics 1012 Distance Name: Lab 9: Specific Heat In this lab, you will measure t
ID: 1643471 • Letter: P
Question
Physics 1012 Distance Name: Lab 9: Specific Heat
In this lab, you will measure the specific heat of the metal ball in your kit. To do this, you will heat it up to nearly 100°C and then submerge it in room temperature water. After measuring the equilibrium temperature, you will apply conservation of energy to find the specific heat of the metal.
Equipment: metal ball and string, thermometer, an insulated container, and a lid. For an insulated container, you can use a coffee mug or Styrofoam cups. If you are using Styrofoam cups, use two and stack one inside the other. For a lid, you could use a lid from a fast food cup or you can just place your hand over the top.
Theory: The main idea in this lab is conservation of energy applied to heat. The heat required to raise the temperature of a mass m by a temperature is given by:
When two objects with temperatures come into contact, heat is transferred from the hotter object to the cooler object. The heat lost by the hotter object must equal the heat gained by the cooler object. ( ) ( )
After experimentally finding the masses and temperatures, you can solve for the specific heat of the metal. You should make your measurements as °C and grams.
Procedure:
1. Begin heating some water.
2. While you are waiting for the water to heat up, record the mass of the metal ball in the table. You have likely already measured this in a previous lab.
3. Place a known volume (~200mL) of cool tap water into a Styrofoam cup. Record the mass and temperature ( ) of the water in the table. Note that 1mL of water has a mass of 1 gram. If you measured the water in ounces, you can convert to metric using 1 oz = 29.57 mL
4. Once the water you are heating is at least 80°C, suspend the metal ball in the water for a minute. Make sure the string stays on the outside so you can get the ball out safely. Measure the temperature of the water and enter it as in the table.
5. Place the hot metal ball into the cool water in the insulated cup. Quickly place the lid on top and monitor the thermometer. The temperature should quickly change and settle on an equilibrium value. Enter this as the final temperature for both the water and the metal. After a few minutes, the temperature will start to drop as heat is lost to the environment. The results are very sensitive to your temperature measurements. A 1° difference in final temperature can lead to a 30% difference in specific heat.
Mass
Initial Temperature
Final Temperature
Water
mwater=
Tiwater=
Tf =
Metal Ball
mmetal=
Timetal=
Tf =
Mass
Initial Temperature
Final Temperature
Water
mwater=
Tiwater=
Tf =
Metal Ball
mmetal=
Timetal=
Tf =
Explanation / Answer
you need to fill table by yourself..as it is based on laboratory work.I can only tell you formula's that you can use.
1). Q=msT where T is change in temperature
in both cases you need to use same formula