ANIMATED HEALTHCARE LTD / SCIENCE PHOTO LIBRARY ANIMATED HEALTHCARE LTD / SCIENCE PHOTO LIBRARY
Animation showing the pressure-temperature law in an ideal gas. The dials at right show the pressure (P), temperature (T) and volume (V) of the gas. The law states that, at a constant volume, an increase in the temperature of a gas causes a proportional increase in its pressure. When the heaters are applied to the box, the particles of gas (grey) heat up (turning red), and travel much more quickly. Their rapid motion causes more frequent collisions with the sides of the container, which is seen as increased pressure. The law is attributed to Jospeh Louis Gay-Lussac (1778-1850), but the basic principle had been established some 100 years beforehand by Guillame Amontons (1663-1705). This animation is part of a series on the ideal gas laws. See K003 3525-3530 for the complete set.
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