The spelling of "pneumatic trough" can be quite tricky, as it involves several silent letters and a unique pronunciation. The word is pronounced as /njuːˈmætɪk trɒf/ and refers to an apparatus used in chemistry experiments to collect or transfer gases. The first part of the word, "pneumatic," comes from the Greek word "pneuma," meaning air or breath, while "trough" refers to a long, narrow container. The silent letters in "pneumatic" and "trough" can make this word challenging to spell, but with practice, it can be mastered.
A pneumatic trough is a scientific laboratory apparatus used in numerous chemical experiments, primarily for collecting and handling gases. It is composed of a shallow, rectangular or cylindrical container made of glass or sometimes metal, usually with a detachable top or lid. The trough is designed to hold water or any other suitable liquid, so as to create a water bath where certain reactions can occur or to act as a sealant for gases.
The main purpose of a pneumatic trough is to collect gases that are produced during various chemical reactions. By inverting the trough filled with water into a larger container partially filled with water, the mouth of the trough is submerged in the liquid, preventing gas from escaping. As the gas is generated, it displaces the water in the trough, causing it to rise and creating a collection chamber.
Pneumatic troughs are commonly used in experiments involving the collection of gases by displacement or to create a controlled environment for reactions that require the absence of air. When used with a gas delivery tube, the trough acts as a receiver for gases that are generated by reactions, providing a convenient way to measure the volume of gas produced.
Overall, the pneumatic trough is an essential apparatus in experimental chemistry, facilitating the manipulation and collection of gases, as well as enabling various chemical reactions within a controlled environment.
A trough, generally made of wood or jaanned tin, having a perforated shelf, used, when filled with water or mercury, for colecting gass made by chemical operations.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "pneumatic trough" is derived from two Greek words.
The first part, "pneumatic", comes from the Greek word "pneuma", which means "breath" or "air". In ancient Greek philosophy, pneuma referred to a vital force or spirit associated with the breath, as well as to the concept of air or wind.
The second part, "trough", is derived from the Old English word "trōg", which means "a long hollow container" or "a canal". It is related to the Old Norse word "trough", which means "a wooden vessel" or "a trench".
Combining these two parts, "pneumatic trough" refers to a long container or canal used for collecting, storing, or manipulating gases or vapors.