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Chapter 1: Problem 79

Give an example of a gas dissolved in another gas. Is this mixture homogeneous?

Short Answer

Expert verified
One common example of a gas dissolved in another gas is the air we breathe, which is primarily composed of nitrogen gas (\(78\%\)) and oxygen gas (\(21\%\)), with traces of other gases such as argon, carbon dioxide, and some other gases. This mixture of gases is considered homogeneous, as the components are evenly distributed throughout the mixture.

Step by step solution

01

Example of a gas dissolved in another gas

One common example of a gas dissolved in another gas is the air we breathe. Air is primarily composed of nitrogen gas (\(78\%\)) and oxygen gas (\(21\%\)), with traces of other gases such as argon, carbon dioxide, and some other gases.
02

Homogeneous Mixture

Now let's analyze whether this mixture of gases is homogeneous or not. In a homogeneous mixture, the components are evenly distributed throughout the mixture. In the case of the air we breathe, the nitrogen, oxygen, and the other trace gases are uniformly combined, so we can say that we breathe a homogeneous mixture of gases.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Gas Solutions
Gas solutions occur when one gas is dissolved in another gas. A common example is the air around us. Here, nitrogen acts as the primary solvent, and oxygen, along with other trace gases, are solutes. In this context, the solution forms because gases can mix evenly at the molecular level. This nature of gases allows them to diffuse and interact freely, creating a uniform mixture.
  • Gas solutions are vital in various natural and industrial processes.
  • The ability of gases to mix spontaneously improves their usage in different applications, such as in breathing or combustion.
Understanding gas solutions requires recognizing how molecules of one gas move within and among the molecules of another gas without separation.
Homogeneous Mixtures
Homogeneous mixtures are uniform in composition, meaning they are the same throughout. In the context of gases, air is a classic example. Even though it contains multiple gases, they are so finely mixed that you cannot identify individual gases with the naked eye. This uniformity means:
  • No visible boundaries exist between different components.
  • Each sample taken from the mixture will be the same as any other.
Homogeneous mixtures are essential in daily life. They ensure consistency in products and processes, making them predictable and reliable.
Atmospheric Composition
The atmosphere is a blend of gases that surround our planet, with nitrogen and oxygen making up most of it. The composition is roughly:
  • Nitrogen: 78%
  • Oxygen: 21%
  • Argon: 0.93%
  • Carbon dioxide: 0.04%
Other trace gases also exist in smaller quantities. This composition supports life by providing essential gases for respiration, photosynthesis, and climate regulation.
The consistency of atmospheric composition worldwide is a testament to the earth's dynamic systems that mix and maintain gas levels, creating a robust environment for various life forms to thrive.

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Most popular questions from this chapter

Sulfur is known in many forms, including yellow sulfur (formula \(\mathrm{S}_{8}\) ) and orange-red sulfur (formula \(\mathrm{S}_{6}\) ). Heating either of these forms to very high temperatures can yield \(\mathrm{S}_{2}\). Also known is a substance with the formula \(\mathrm{SO}_{2}\). Since all of these substances are made of elements, are they all elemental substances? Explain.

The freezing point of nitrogen is \(-210.0{ }^{\circ} \mathrm{C}\). The boiling point of nitrogen is \(-195.8^{\circ} \mathrm{C}\).

In the chemical reaction for the "burning" of sugar, \(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{O}_{2} \rightarrow 6 \mathrm{CO}_{2}+6 \mathrm{H}_{2} \mathrm{O}\), which substances are the reactants and which are the products? Does this equation represent a chemical change or a physical change?

True or false? A theory is an attempt to explain why a law is true.

Solid mothballs work by filling a closet with a chemical vapor that is toxic to moths, and the balls shrink and disappear slowly with time. What is going on?
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