CSEC Physics Lab - Specific Heat Capacity
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1. The document describes an experiment to determine the specific heat capacity of a metal using the method of mixtures. 2. A metal sample was boiled in water for 5 minutes and then quickly transferred to a Styrofoam cup containing water. 3. The temperatures of the metal and water were measured before and after mixing to calculate the specific heat capacity of the metal, which was found to be 368°C compared to the theoretical value of 380°C.
CSEC Physics Lab - Specific Heat Capacity
- 1. Metal: Brass Scale is very sensitive Mass 49.99 You use two stryfoam cups to increase insulation to prevent heat loss. Mass of cup 4.64, Both 9.28 289.32g Mass of both cup and water Mass of water 280.04 Initial temperature of pure water 29°C Final temperature of water 30°C Initial Temperature of water with metal 94 You transfer the metal as quick as possible to prevent heat loss to the environment When you stir do not let the rod touch the bottom of the cup Specific Heat Capacity - 368°C Theoritical value is 380
- 2. Aim: To find the specific heat capacity of a metal using the method of mixtures. Apparatus: metal, liquid, Styrofoam cup, thermometer, balance, beaker, tripod, gauze, B unsen Burner, string. Procedure: 1. The mass, ms, of the metal was found using the balance and was recorded. 2. A string was tied to the metal. 3. The metal was placed in a beaker of water and the water was boiled with the metal in it for at least 5 mins. 4. The mass of the Styrofoam cups alone and the combined mass of the cups and the wa ter were found using the balance. These values were used to find the mass of the water i n the cup. 5.The initial temperature of the liquid in the cup was found using the thermometer. 6. The temperature of the boiling water was measured and was recorded as the initial te mperature of the metal. 7. The metal was transferred from the beaker to the water in the Styrofoam cup as quick ly as possible and was stirred. 8. The highest temperature of the liquid in the cup was recorded. Results: Below shows the results of the experiment Mass of Brass Metal - 49.99g Mass of Styrofoam Cups - 9.28g Mass of Cup and Water - 289.32g Mass of Water - 280.04g Initial Temperature of Water - 29°C Final Temperature of Water - 30°C Initial Temperature of Metal- 94 ° C Calculations: 1. Below shows how the mass of the water in the Styrofoam cup was calculated Mass of Cups & Water - Mass of Cups 289.32 - 9.28 = 280.04g 2. Below shows how the change in temperatures of the different substances were calculated
- 3. Discussion The metal must be transferred quickly to prevent heat loss to the environment. The temperature falls after a while due to heat lost to the cup and surroundings Styrofoam is a good insulator so it is a good choice as a container. The assumption is not strictly true because heat is lost during the experiment making the value lower than the true value. Sources of Error: Heat lost to the surroundings when transferring the metal, heat lost to the cup, There was a possibility that the thermometer came in colntact with the apparatus thus ta king the temperature of the apparatus and not the material