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The year 1884 in science and technology involved some significant events, listed below.
1884 (MDCCCLXXXIV) was a leap year starting on Tuesday of the Gregorian calendar and a leap year starting on Sunday of the Julian calendar, the 1884th year of the Common Era (CE) and Anno Domini (AD) designations, the 884th year of the 2nd millennium, the 84th year of the 19th century, and the 5th year of the 1880s decade. As of the start of 1884, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.
Svante August Arrhenius was a Swedish scientist. Originally a physicist, but often referred to as a chemist, Arrhenius was one of the founders of the science of physical chemistry. He received the Nobel Prize for Chemistry in 1903, becoming the first Swedish Nobel laureate. In 1905, he became the director of the Nobel Institute, where he remained until his death.
In physical chemistry, the Arrhenius equation is a formula for the temperature dependence of reaction rates. The equation was proposed by Svante Arrhenius in 1889, based on the work of Dutch chemist Jacobus Henricus van 't Hoff who had noted in 1884 that the van 't Hoff equation for the temperature dependence of equilibrium constants suggests such a formula for the rates of both forward and reverse reactions. This equation has a vast and important application in determining the rate of chemical reactions and for calculation of energy of activation. Arrhenius provided a physical justification and interpretation for the formula. Currently, it is best seen as an empirical relationship. It can be used to model the temperature variation of diffusion coefficients, population of crystal vacancies, creep rates, and many other thermally induced processes and reactions. The Eyring equation, developed in 1935, also expresses the relationship between rate and energy.
A timeline of events in the history of thermodynamics.
Sofya Vasilyevna Kovalevskaya, born Korvin-Krukovskaya, was a Russian mathematician who made noteworthy contributions to analysis, partial differential equations and mechanics. She was a pioneer for women in mathematics around the world – the first woman to obtain a doctorate in mathematics, the first woman appointed to a full professorship in northern Europe and one of the first women to work for a scientific journal as an editor. According to historian of science Ann Hibner Koblitz, Kovalevskaya was "the greatest known woman scientist before the twentieth century".
The year 1850 in science and technology involved some significant events, listed below.
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The year 1889 in science and technology involved some significant events, listed below.
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The year 1883 in science and technology involved some significant events, listed below.
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The year 1844 in science and technology involved some significant events, listed below.
Ludwig Eduard Boltzmann was an Austrian physicist and philosopher. His greatest achievements were the development of statistical mechanics, and the statistical explanation of the second law of thermodynamics. In 1877 he provided the current definition of entropy, , where Ω is the number of microstates whose energy equals the system's energy, interpreted as a measure of the statistical disorder of a system. Max Planck named the constant kB the Boltzmann constant.
Friedrich August Johannes Loeffler was a German bacteriologist at the University of Greifswald.
Events in the year 1884 in Germany.
Hans Max Jahn was a German physical chemist who worked on thermochemistry and electrochemistry. As an experimental chemist he identified problems in the contemporary theory of electrolyte conductivity and examined the thermodynamic validity of the Gibbs-Helmholtz equation.
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