Why do gases occupy different volumes in eudiometry?

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In summary, the conversation discusses the concept of eudiometery and how gases can occupy different volumes in a eudiometery tube. It is explained that while gases typically occupy the entire volume of the container, this is not always the case, as seen in the example of 15ml of hydrocarbons and 320ml of other gases. The conversation also touches on the mixing of gases and how, under STP, 1 L of oxygen and 1 L of nitrogen will result in a 2 L mixture. While technically only the former measurement is 100% correct, the latter is a mental shortcut for easier calculations and understanding of the mixture composition.
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I know how to solve problems of eudiometery but i don't understand a really basic thing ie how come gases occupy different volumes in an eudiometery tube. (For eg: 15ml of hydrocarbons with 320ml other gases). Gases occupy entire volume of the container, right. So shouldn't all gases occupy the same volume equal to the volume of eudiometery tube?
 
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When you mix 1 L of oxygen and 1 L of nitrogen under STP you get 2 L of a mixture. You can say each gas occupies 2 L and its partial pressure is 0.5 atm, you can say each gas occupies 1 L and has the pressure of 1 atm. Technically only the former is 100% correct, but the latter makes calculations and thinking about the mixture composition easier. Kind of a mental shortcut.
 
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1. What is eudiometery?

Eudiometery is a laboratory technique used to measure the volume of gases involved in a chemical reaction.

2. Why is eudiometery important?

Eudiometery is important because it allows scientists to accurately determine the quantities of gases involved in a chemical reaction, which is crucial for understanding the reaction and its products.

3. How does eudiometery work?

Eudiometery involves using a eudiometer, which is a graduated glass tube with a closed end, to collect and measure the volume of gases produced or consumed in a reaction. The volume of the gas is then used to calculate the amount of substance involved in the reaction.

4. What are some common sources of error in eudiometery?

Some common sources of error in eudiometery include temperature and pressure fluctuations, gas leaks, and inadequate mixing of reactants.

5. How can one minimize errors in eudiometery?

To minimize errors in eudiometery, it is important to use precise measuring equipment, carefully control the temperature and pressure of the reaction, and ensure thorough mixing of reactants. It is also important to repeat the experiment multiple times and take the average of the results to reduce the impact of any individual errors.

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