Following in Michael Faraday's footsteps, Demo Technician Andy Marmery explores the paramagnetic properties of liquid oxygen at the Royal Institution in London.
The liquid oxygen is prepared by passing oxygen gas through a copper coil immersed in a beaker of liquid nitrogen. The oxygen has a higher boiling point than nitrogen meaning that it condenses in the coil.
Andy then demonstrates the paramagnetic properties of liquid oxygen by pouring it between two poles of a large magnet.
Michael Faraday discovered that the magnetic properties of gases depended on the temperature of the gases as well as the gaseous medium in which he conducted his experiments. He first observed that oxygen behaved magnetically, rather than diamagnetically, at the Royal Institution in 1847.
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