On November 23, 1837 Dutch theoretical physicist and Nobel Laureate Johannes Diderik van der Waals was born. He is best known for his work on an equation of state for gases and liquids.
Johannes van der Waals Background
Johannes Diderik van der Waals was the son of a carpenter and could only receive ‘advanced primary education’, which would later on not be enough to actually enroll at a university. When he was 15, his father expected his son to go into the carpenter business as well but instead, van der Waals decided to become a teacher’s apprentice at an elementary school. During this period, he worked hard and continued to educate himself to earn qualifications to become a primary school teacher.
His interest in mathematics and nature sciences grew and van der Waals was able to attend the University of Leiden. Still, he could not enroll as a regular university student, but he was able to take up to four courses a year and eventually became a physics teacher at a school for children of the higher middle class in 1866. Still his problems were the classical languages that van der Waals had never learnt. Fortunately, the minister of education gave him a dispensation from the classical languages and he could finally take the examinations in order to start his doctoral studies in the field of physics and mathematics. In 1873, he defended his doctoral thesis ‘On the continuity of the gaseous and liquid state’ in which he introduced the concepts of molecular volume and molecular attraction. Through his thesis, Johannes van der Waals was one of the first known scientists to have postulated an intermolecular force, which is now referred to as the ‘van der Waals force’.
Law of Corresponding States
In 1877, the Municipal University of Amsterdam was founded and van der Waals was appointed first professor of physics there. In this period, the scientist formulated the ‘Law of Corresponding States’, which highly influenced James Dewar’s experiments leading to the liquefaction of hydrogen. In later years, he was succeeded by his son, who became a theoretical physicist as well. In 1910, he was awarded the Nobel Prize in physics.
During his life of simultaneous learning and teaching, Johannes van der Waals made numerous scientific contributions in his fields of study. Especially the field of thermodynamics kept the scientist busy. Important influences in his studies were James Clerk Maxwell, Ludwig Boltzmann, Rudolf Clausius and many more. Because of Claudius’ earlier works, van der Waals was able to explain the existence of critical temperatures that were observed by Thomas Andrews. Also, van der Waals’ dissertation was reviewed by Maxwell in the scientific journal Nature.
If you wonder, how the famous Van der Waals equation works, you may enjoy a short video lecture by Hank Green.
References and Further Reading:
-  Over de Continuiteit van den Gas- en Vloeistoftoestand (on the continuity of the gas and liquid state
-  Waals Sr., Johannes Diderik van der (1837–1923)
-  Van der Waals at the Nobel Prize Foundation
-  James Clerk Maxwell and the Electromagnetic Fields, SciHi Blog
-  The World’s most important Scientific Journal – Nature, SciHi Blog
-  Modern Chemistry started with Lavoisier, SciHi Blog
-  Van der Waals at Wikidata
-  Timeline of Johannes van der Waals via Wikidata