The concepts of heat and temperature They are closely related, since heat is the perception of a living being of a high temperature, while temperature is a physical quantity that reflects the amount of heat.
Heat is all the energy produced by the movement of molecules in a certain substance, while temperature is a measure of the average molecular energy.
The heat depends on the speed at which the particles are moving. The quantity, size and number of particles also influence it. The temperature does not depend on these variables.
Heat increases or decreases the temperature. Adding heat increases the temperature; when removing heat, it decreases.
Heat is energy, while temperature is a measure of it.
Let's go to an example:
The temperature of coffee in a cup can be the same as the temperature of coffee in a 5-liter jug; however, there will be more heat in the jug, because with more liquid, there will be more total thermal energy.
Heat: Heat enters a body in the process known as heating, and the unit of measurement that refers to the amount of thermal energy necessary for the transfer is called calories, and represents an energy quantity. Matter necessarily has the property of heat, since it has to do with the movement of the particles inside it.
Then, the unit of measurement of heat represents the amount of energy that is needed for the transfer from one unit to another, and is the calorie, or Joules: a calorie represents 4,184 Joules.
Temperature: Temperature is represented by more frequent units of measurement, which also quantify the activity of molecules inside matter. Temperature indicators give rise to different particulars of matter, such as state, solubility, and volume.
Regarding the state, we can say that there is a certain temperature level (different depending on the substance), that once exceeded, the body ceases to be solid and becomes liquid, and another temperature level that once exceeded, leaves from being liquid to becoming gaseous.
The measurement units more frequent temperature are:
- Celsius: Consider 0 degrees the level where water goes from solid to liquid, and 100 as the level where it goes from liquid to gaseous,
- Fahrenheit: Where the temperature responds to a combination of substances that make 0 and 100,
- Kelvin: It is the unit of absolute temperature, zero Kelvin is the point where substances make the least possible movement.
See also: Examples of Temperature Conversion
The temperature It is a very important element for the body, since the vital mechanism of homeostasis that people have is what leads to the maintenance of relative constancy in terms of temperature. Very abrupt swings in body temperature can lead to very serious problems, and even death.
The normal body temperature that is generally accepted is that of 37 ° C, but with a certain range between 36.1 ° C and 37.2 ° C. Above that temperature, it will be said that the person has a low-grade fever or fever.
See also: Examples of Thermal Equilibrium
Here are some examples of heat and temperature in different circumstances:
- The emission of heat produced by a bulb.
- The process of heating a liquid, whereby the hot part moves up and the cold part down.
- The separation of the contained molecules to a unit mass, and then the change from the liquid phase to the vapor phase when it exceeded the heat of vaporization.
- The waters of the sea surface, which receive radiation from the sun.
- Touch a spoon that was in a glass of very hot milk, and consequently it will also be hot.
- The heat received by a person who is cooking, even though they are not actually in the place where the heat is produced
- The doctor, who when he controls a patient takes his temperature.
- The melting of a unit mass of a solid substance, when the body went through the heat of fusion.
- Physical exercise, which allows you to burn calories.
- Heat expelled by a running engine.
- The water when it boils, because it exceeded 100 ° C.
- In solids with a rod, the heat spreads to the rod.
- A stove.
- The cure point of refractory materials, 500 ° C
- The process of heating in a pan, where the heat flow spreads to the handle.
- The dehydration point of metal parts, 250 ° C.
- The process of ice production, called water solidification, where the temperature becomes less than 0 ° C
- Heat energy in a vacuum, which is propagated by radiation.
- The refrigerant in the refrigerator.
- The light that comes to us from the sun, which carries energy through radiation.
