Temperature: Difference between revisions
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== | ==Defining temperature== | ||
Temperature is measure of average kinetic energy of the particles in a system. Difference between temperature and heat is that heat is the sum of all the kinetic energies of the particles in a system. Adding heat to a system causes its temperature to rise. Newton's zeroth law states that a system reaches a thermal equilibrium when there is no observable change in temperature between a system. Therefore, the change in temperature causes heat to flow from a high temperature system to a low temperature system. | Temperature is measure of average kinetic energy of the particles in a system. Difference between temperature and heat is that heat is the sum of all the kinetic energies of the particles in a system. Adding heat to a system causes its temperature to rise. Newton's zeroth law states that a system reaches a thermal equilibrium when there is no observable change in temperature between a system. Therefore, the change in temperature causes heat to flow from a high temperature system to a low temperature system. | ||
===Measurement=== | |||
Temperature can be measured in numbers by three temperature scales: Celsius, Fahrenheit, and Kelvin. Celsius scale sets freezing point of the water at zero and boiling point at 100, and Fahrenheit scale sets freezing point of the water at 32 degrees and boiling point of the water at 212 degrees. Kelvin scale is designed to go to zero at absolute zero, the minimum temperature. | |||
===A Mathematical Model=== | ===A Mathematical Model=== | ||
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Q = m c Delta T | Q = m c Delta T | ||
The relationship between temperature scales: | |||
(degrees)K = 273.15 + (degrees)C (degrees)C = (5/9)*(oF-32) (degrees)F = (9/5)*(degrees)C+32 | |||
==Examples== | ==Examples== | ||
Revision as of 11:48, 5 December 2015
Defining temperature
Temperature is measure of average kinetic energy of the particles in a system. Difference between temperature and heat is that heat is the sum of all the kinetic energies of the particles in a system. Adding heat to a system causes its temperature to rise. Newton's zeroth law states that a system reaches a thermal equilibrium when there is no observable change in temperature between a system. Therefore, the change in temperature causes heat to flow from a high temperature system to a low temperature system.
Measurement
Temperature can be measured in numbers by three temperature scales: Celsius, Fahrenheit, and Kelvin. Celsius scale sets freezing point of the water at zero and boiling point at 100, and Fahrenheit scale sets freezing point of the water at 32 degrees and boiling point of the water at 212 degrees. Kelvin scale is designed to go to zero at absolute zero, the minimum temperature.
A Mathematical Model
The relationship between heat transfer and temperature can be modeled with this equation:
Q = m c Delta T
The relationship between temperature scales: (degrees)K = 273.15 + (degrees)C (degrees)C = (5/9)*(oF-32) (degrees)F = (9/5)*(degrees)C+32
Examples
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