To solve problems involving gas undergoing a change intemperature must be Kelvins why not Celcius? describe?

Question

chemistry
heat and gas laws
mainly
charles and gays

Answer 1

Because Kelvin is based on absolute zero and counts up from there. It is an absolute scale and the ONLY absolute temperature scale. Celsius is based off of Kelvin. Kelvin is the only absolute thermometric scale.

Fahrenheit is based on measurements of a waterfall and the changes in temperature as the water fell off it. We don’t have that same waterfall everywhere.
Celsius is based on the freezing and boiling points of water. Water changes it’s boiling and freezing point with its composition and the air pressure (salt water freezes at a lower temperature).

According to Wikipedia: http://en.wikipedia.org/wiki/Celsius
“Celsius is, or relates to, the Celsius temperature scale (previously known as the centigrade scale). The degree Celsius (symbol: °C) can refer to a specific temperature on the Celsius scale as well as serve as unit increment to indicate a temperature interval (a difference between two temperatures or an uncertainty). “Celsius” is named after the Swedish astronomer Anders Celsius (1701 – 1744), who developed a similar temperature scale two years before his death.
Until 1954, 0 °C on the Celsius scale was defined as the melting point of ice and 100 °C was defined as the boiling point of water under a pressure of one standard atmosphere; this close equivalency is taught in schools today. However, the unit “degree Celsius” and the Celsius scale are currently, by international agreement, defined by two different points: absolute zero, and the triple point of specially prepared water. This definition also precisely relates the Celsius scale to the Kelvin scale, which is the SI base unit of temperature (symbol: K). Absolute zero—the temperature at which nothing could be colder and no heat energy remains in a substance—is defined as being precisely 0 K and −273.15 °C. The triple point of water is defined as being precisely 273.16 K and 0.01 °C.

This definition fixes the magnitude of both the degree Celsius and the unit kelvin as being precisely 1 part in 273.16 parts the difference between absolute zero and the triple point of water. Thus, it sets the magnitude of one degree Celsius and the kelvin to be exactly equivalent. Additionally, it establishes the difference between the two scales’ null points as being precisely 273.15 degrees Celsius (−273.15 °C = 0 K and 0.01 °C = 273.16 K).”

According to Wikipedia: http://en.wikipedia.org/wiki/Fahrenheit
“Fahrenheit is a temperature scale named after the German-Dutch physicist Daniel Gabriel Fahrenheit (1686–1736), who proposed it in 1724.

In this scale, the freezing point of water is 32 degrees Fahrenheit (written “32 °F”), and the boiling point is 212 degrees, placing the boiling and freezing points of water exactly 180 degrees apart. On the Celsius scale, the freezing and boiling points of water are exactly 100 degrees apart, thus the unit of this scale, a degree Fahrenheit, is 5⁄9 of a degree Celsius. The Fahrenheit scale coincides with the Celsius scale at -40 °F, which is the same temperature as -40 °C.
Absolute zero is −459.67 °F. The Rankine temperature scale was invented to use degrees the same size as Fahrenheit degrees, so 0 °R would be absolute zero, namely −459.67 °F.”

According to Wikipedia: http://en.wikipedia.org/wiki/Kelvin
“The kelvin (symbol: K) is a unit increment of temperature and is one of the seven SI base units. The Kelvin scale is a thermodynamic (absolute) temperature scale where absolute zero — the coldest possible temperature — is zero kelvins (0 K).

The Kelvin scale and the kelvin are named after the Irish-born physicist and engineer William Thomson, 1st Baron Kelvin (1824 – 1907), who wrote of the need for an “absolute thermometric scale.””

Answer 2

The simplest way to answer this is that the equation was developed using Kelvin temperatures, not celsius. Obviously the two are not the same, therefor if you use a Celsius temperature you get the wrong answer.

Answer 3

The Kelvin scale has no negative numbers.