English physicist James Joule's 1844 volume expansion experiment: wherein a pressurized volume A is connected to a vacuumed volume B, the connecting valve is opened, and temperature change is recorded (no change was found); which gave experimental proof to Joule's second law, that the internal energy of an ideal gas body is independent of volume or volume change, depending only on temperature. [4] |
A modern rendition of Joule's classic dual bulb experiment, which, according to American thermodynamicist Merle Potter, took place in 1843. [5] |
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