Converter degrees celsius

In the Fahrenheit scale, water freezes at 32 degrees, and boils at degrees. Boiling and freezing point are therefore degrees apart. Normal body temperature is considered to be Absolute zero is defined as The Celsius scale is nowadays set in such a way that Zero degrees C is the temperature at which ice melts note : not the temperature at which it freezes, which is different!

At the other end of the scale, degrees Celsius is the boiling point of water. The scientific definition of Celsius is now defined against degrees Kelvin. In climatology, for example, temperature intervals for a given month or season are monitored, to determine any short-term and long-term changes in the climate patterns for a given region.

In cooking, foods are temperature-treated, to change their flavor and to make them safe, and the temperature interval determines the outcome of the cooking process with regards to safety, texture, flavor, etc. In natural substances and materials keep their state constant within a given temperature interval, and undergo phase changes if the temperature increases or decreases.

There are many more examples of the importance of temperature intervals, but this article will focus on the latter two. For every material, there exists a temperature interval for which it is in a solid state, another interval for which it is in a liquid state, and finally an interval for which it is a gas. The temperatures at which the crystals of given substances liquefy and liquids evaporate are called melting point and boiling point , respectively.

The temperature intervals for each state as well as the melting and boiling points are dependent on pressure, and often the quoted temperatures are for atmospheric pressure at the mean sea level. For this special case, the boiling point is called normal or atmospheric boiling point. The melting point is called atmospheric melting point.

If the pressure and temperature are sufficiently high, then the substance reaches a state where it behaves the same in a liquid and a gas form. This is called a critical point , and the substance is said to be a supercritical fluid. While the temperature intervals for the solid, liquid, and gaseous stages are usually specific for each given substance, phase changes can occur even within these temperature intervals. For example, liquids may evaporate below the boiling point. Most people know the temperature ranges for different states of water, both in liquid form and in crystallized form as ice.

Mountaineers encounter lower atmospheric pressure when ascending high mountain peaks, and can watch water boil at lower temperatures there. This change in the boiling point temperature makes it necessary to increase cooking times, otherwise, the foods may be undercooked.

In some cases, mountaineers use small pressure cookers, which artificially increase the pressure, and thus — the boiling point. The temperature that the water reaches a boiling point is the maximum temperature it will reach in this given environment.

Therefore, cooking that involves water is affected by altitude. Air is not affected, however; thus, dry cooking methods like roasting do not change significantly. Rising pressure also affects the process of cooking by increasing the boiling point of water. The pressure cooker does not allow steam to escape, and because of this, as the temperature inside increases, so does the pressure.

Temperature intervals are very important in cooking because choosing the temperature affects how the foods behave, and what effect with regards to taste, texture, and consistency is achieved. This is especially true for proteins, which behave very differently at different temperatures.

As the temperature increases, the amino acid molecules that make up the proteins and are curled into a ball-like shape, start to uncoil. Because of this the structure and texture of the protein change. Thus starts the process of coagulation or denaturation in proteins.

It is important to note that other factors, such as the duration of heat exposure, contact with other foods such as those containing acids, etc.

The other point at which Celsius was set — degrees Celsius — was defined as the boiling point of water. Since its definition, the Celsius scale has been redefined to peg it to Kelvin. Zero degrees Celsius is now defined as As one degree Celsius is equal to one Kelvin, boiling point of water is equal to The Fahrenheit temperature range is based on setting the freezing point of water at 32 degrees, and boiling to degrees.

The Celsius and Kelvin scales are precisely related, with a one-degree change in Celsius being equal to a one degree-change in kelvin. The kelvin and thus Celsius is defined based on the Boltzmann constant, k, which equals 1.

Celsius as a unit and a scale was not widely used until this original definition was inverted.