Specific Heat Capacities of Metals
Title: Specific Heat Capacities of Metals
Experiment Date: 3/28/2012
Report Date: 4/4/2012
Purpose:
The purpose of the lab is to measure the specific heat capacities of aluminum, steel and brass.
Theory:
The amount of heat (ΔQ) required to change the temperature of an object is proportional to the mass (m) of the object and the temperature change (ΔT) of the object. ΔQ= cmΔT where c is called as the specific heat capacity of the material. In the calorie units system the unit of quantity of heat “calorie” is defined as the amount of heat required to raise the temperature of one gram of water from 14.5°C to 15.5°C. Then, water has a specific heat of 1 cal/g°C, .
The specific heat of a material can be determined experimentally by measuring the temperature change of a given mass of material produced by a quantity of heat. This is done by method of mixture. An object of mass m is heated to an initial temperature T1 and then dropped into water of mass mw at temperature Tw. The mixture will come to equilibrium at a final temperature T2, if no energy is lost to the surroundings during the process, conservation of energy requires that the heat lost by the object equals the heat gained by the water, m c (T1-T2) = mwcw (T2-T w) where c and cw are the specific heats of the material and water respectively.
Procedure:
Fill 1000 g water in the beaker placed on the hot plate. Turn on the power of the hot plate. Heat the water in the beaker up to 100°C. Measure and record the masses of each object then heat them by suspending from a string in a beaker of boiling water. Measure and record the initial temperature T1 of the object with the thermometer 1(0---100°C) inside the beaker. Place 100 g of room temperature water (mw) in the plastic cup. Measure and record the initial temperature Tw with thermometer 2 (0---50°C) inside the cup. Remove one object from the boiling water by holding it by the string, quickly place it in the cup, and cover it. Gently shake the
Experiment Date: 3/28/2012
Report Date: 4/4/2012
Purpose:
The purpose of the lab is to measure the specific heat capacities of aluminum, steel and brass.
Theory:
The amount of heat (ΔQ) required to change the temperature of an object is proportional to the mass (m) of the object and the temperature change (ΔT) of the object. ΔQ= cmΔT where c is called as the specific heat capacity of the material. In the calorie units system the unit of quantity of heat “calorie” is defined as the amount of heat required to raise the temperature of one gram of water from 14.5°C to 15.5°C. Then, water has a specific heat of 1 cal/g°C, .
The specific heat of a material can be determined experimentally by measuring the temperature change of a given mass of material produced by a quantity of heat. This is done by method of mixture. An object of mass m is heated to an initial temperature T1 and then dropped into water of mass mw at temperature Tw. The mixture will come to equilibrium at a final temperature T2, if no energy is lost to the surroundings during the process, conservation of energy requires that the heat lost by the object equals the heat gained by the water, m c (T1-T2) = mwcw (T2-T w) where c and cw are the specific heats of the material and water respectively.
Procedure:
Fill 1000 g water in the beaker placed on the hot plate. Turn on the power of the hot plate. Heat the water in the beaker up to 100°C. Measure and record the masses of each object then heat them by suspending from a string in a beaker of boiling water. Measure and record the initial temperature T1 of the object with the thermometer 1(0---100°C) inside the beaker. Place 100 g of room temperature water (mw) in the plastic cup. Measure and record the initial temperature Tw with thermometer 2 (0---50°C) inside the cup. Remove one object from the boiling water by holding it by the string, quickly place it in the cup, and cover it. Gently shake the