In this experiment you will increase the temperature of metal specimens to that of boiling water. Then you'll place each specimen in a double Styrofoam cup that contains room temperature water. The specimen will and cool and the water temperature will rise until both are at the same temperature. Or the heat loss by the metal is equal to that of the heat gain by the water. Specific heat (c) is the quantity of heat (Q) per mass (m) per change in temperature (T). For water for example its specific heat is equal to .
4.184 J g
• °C.
Objective: .
To heat a metal and find the temp. change in water. Then find the specific heat of the metal by Qmetal = -Qwater.
Materials:.
hot plate metal specimens beaker tongs Styrofoam cups (2).
balance thermometer tape.
Procedure:.
1. Measure the mass of each specimen. Then place the specimens in a beaker of water, deep enough to cover the specimens, and heat the beaker to boiling.
2. While the beaker is being brought to a boil, assemble the pairs of Styrofoam cups with one cup inside the other as you have specimens. The device you are suppose to make with the cups is called a calorimeter. Fill the cup up with water that will cover the object.
3. Let the water in the beaker boil vigorously for more than a minute until you are convinced the specimens are in thermal equilibrium with the boiling water. Then use tongs quickly remove the specimen from the boiling water, and place it in the calorimeter.
4. Shake the calorimeter help equilibrium the thermal energy. Then find the final temperature of the water in the calorimeter.
Conclusion:.
By doing this lab I learned about specific heats of some metal specimens. Some absorbed a great deal of heat and some absorbed very little heat form the boiling water. The errors in my results could have been caused by using Styrofoam cups calorimeter. My best results came when the temperature was raised more than 7 degrees.
The last method of heat transfer is radiation. Radiation is the transfer of energy as electromagnetic waves. ... Because radiant heat is transferred in waves, it moves at the speed of light. ... The "R" stands for rescue; knowing the three methods of heat transfer can help you make a rescue much safer. ... Knowledge of all three ways that heat transfers can give you better understanding of what a fire is going to do. ...
Heat Heat is the transfer of energy that results from temperature difference between two objects or systems. At molecular level, heat refers to the transfer of energy that stimulates disordered molecules. ... Transfer of heat energy is measured in calorimetric units. ... Therefore, temperature a measure of the results from heat transfer. ... Closely packed molecules have limited movement and thus do not transfer the heat they contain at a faster rate. ...
Latent Heats and Specific Heat Capacity Objective: The purpose of this lab was to find specific heat capacity of a certain material and the latent heat of another by experimentation, and to compare them to already known values. ... The three calculated values for heat of fusion were used to take an average heat of fusion. ... After placing the 100-gram iron in the calorimeter, we waited for the iron to transfer its heat. ... We knew this because some steam did escape as we transferred it to the cup. ... We calculated the specific heat capacities and heat of fusion with the greatest p...
Three trials were conducted using a calorimeter with water at room temperature and ice along with known values of specific heat of water and the calorimeter to determine the unknown latent heat of fusion. ... Introduction The purpose of this experiment is to determine the latent heat fusion of ice. Physics for Dummies reports that latent heat is the heat needed to cause a change in phase per kilogram.[1] The law of conservation of energy states that energy is neither created nor destroyed.[2] Instead, energy is transferred; the first Law of Thermodynamics is examined. ... Each of our water s...
If there is no connection the transfer is less effective. ... How is the Principle of Transfer defined? ... This is the Transfer Principle in action. ... Having trained in the heat we were prepared and not shocked by the heat in Taipei. ... The Principle of Transfer has one key part that, if missed, will negatively effect the Principle of Transfer. ...
The third limitation is that in the heat transfer model of the previous model, only a simple buried condition is considered. ... And the heat transfer between the trapped fluid and pipe wall is over simplified. ... In this study, a more complex heat transfer model will be developed. And the natural and forced convection of the released fluid will be applied to pipe wall heat transfer condition. ... In the model, heat transfer coefficients are effectively estimated from extant literature. ...
-Thermodynamics-branch of physics dealing with processes and laws governing the transformation of heat into other forms of energy, heatmechanical work. ... -Thermo-study of macroscopic systems-micro systems include mass, velocity, and KE-marco level includes-temp, vol, pressure, thermoconductivity, viscosity, heat capacity. ... -3 ways to change internal E-1) add or remove heat, 2) doing work on it or it doing work on something, 3) adding or removing particles that undergo reactions. ... -Particle transfer-elements can store energy as PE or KE when particles when particles transfer from o...
Dryers can be direct, indirect, or radiant-heat and continuous or batch wise. ... Heat transfer: As heat is introduced to the system, water at the surface will begin to evaporate. ... The relevant equation for heat transfer by convection is Fourier's Law: 2. Mass transfer: The liquid within the desiccant will diffuse to the surface from where it will diffuse into the hot air as a vapor. ... Heat Exchangers (5) 5. ...
Atmosphere Gas - Nitrogen (most abundant), oxygen, / carbon dioxide - has the ability to absorb heat radiated by earth, water vapor Atmosphere Pressure is in MB - Atmosphere pressure in the PPI - Atmosphere pressure at sea level - slightly more 1000 millibars, pressure decrease with altitude 3.5 miles 50% atmosphere is below 10 miles 90% atmosphere is below Atmospheric carbon dioxide is transparent to incoming Short-Wavelength solar radiation. ... Ozone -combines 3 atom oxygen (03) / concentrate between 10-50 kilometers above the stratosphere / absorbs harmful ultraviolet radiat...
