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# Charles Law (Initial temperature)

vCalc.Charles Law (Initial temperature)

The **Charles Law (Initial temperature)** equation computes the initial temperature of a fixed mass of gas before it underwent a change in volume.

## INPUTS

Based on Charles Law we can compute the initial temperature give the following:

- `T_2`: the resultant temperature
- `V_1`: the initial volume
- `V_2`: the resultant volume

Remember to input temperatures in degrees Kelvin: K = C + 273. However, other temperature units are available and will be automatically converted to Kelvin.

# NOTES

Charles law is an experimental gas law which describes how gases tend to expand when heated. Charles law states: The volume of a given mass of a gas is directly proportional to its temperature (measured in Kelvin the absolute temperature scale). If pressure and the amount of gas remain constant; the law states, the **volume of the gas increases or decreases by the same factor as its temperature change**. The law was named after scientist Jacques Charles, who formulated the original law in his unpublished work from the 1780s.

Jacques Charles (1746 - 1823) discovered the relationship between the volume of a gas and the temperature in 1787. This relationship was discovered again independently by Joseph Louis Gay-Lussac in 1802.

Charles is credited with many discoveries in the area of ballooning; he invented the suspending basket carried on balloons and the valves to regulate the gas in the balloons. Charles was the first to experiment with small hydrogen filled balloons.

**Charles Law (Initial temperature)**, is used in 2 calculators.

**Calculators**