chemistry

Otto Sackur

Otto Sackur is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Otto Sackur rather than just read about it. In short: Otto Sackur (28 September 1880 in Breslau, Germany – 17 December 1914 in Berlin, Germany) was a German physical chemist. He is known for the development of the Sackur–Tetrode equation, which he developed independently of Hugo Tetrode.

Key takeaways

Otto Sackur belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Otto Sackur to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Otto Sackur from memory before moving on to harder problems.

Reference excerpt

Otto Sackur (28 September 1880 in Breslau, Germany – 17 December 1914 in Berlin, Germany) was a German physical chemist. He is known for the development of the Sackur–Tetrode equation, which he developed independently of Hugo Tetrode. His and Tetrode's names are also combined to name the Sackur–Tetrode constant derived using the equation. Sackur studied at the University of Breslau, receiving his doctorate there in 1901 under Richard Abegg. He received his Habilitation in 1905 under Richard Abegg. He then worked in London before joining the Fritz Haber Institute in Berlin, becoming the head of the physical chemistry department early 1914. He had good relations with Clara Immerwahr. They studied as doctoral students together, and Immerwahr was the one who got him the job in the Institute. After the outbreak of WWI, he was enlisted for military research, and during his free time he carried out experiments on the behavior of gases at low temperatures. During experiments on chemical warfare, he mixed a beaker of dichloromethylamine with cacodyl chloride, and while observing it at eye level, it exploded. The explosion was so powerful that it killed him on site; even Gerhard Leopold Just (1877-1948), an assistant to Haber, lost his right hand in the explosion while trying to save Otto by snatching the exploding beaker. Haber, Just, and Sackur were back then researching on improvements to the T-Shell, with the aim of finding some chemical that could serve both as an explosive and an irritant. Cacodyl chloride, first synthesized by Robert Bunsen in 1837, fit the description. Indeed, it had scarcely been researched since its discovery precisely because it is highly irritating and explosive.

References

External links Works by or about Otto Sackur at the Internet Archive

Worked examples

Example 1 — a first encounter with Otto Sackur

Start with the simplest possible case. Write down what Otto Sackur claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Otto Sackur before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Otto Sackur ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Otto Sackur

In research: Otto Sackur appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Otto Sackur in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Otto Sackur is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1880 births, 1914 deaths, 20th-century German chemists, so understanding it makes those chapters shorter.
In everyday life: Look for Otto Sackur outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Otto Sackur in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Otto Sackur means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Otto Sackur out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Otto Sackur in simple terms?

Why does Otto Sackur matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Otto Sackur?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Otto Sackur.