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Ch.13 - Properties of Solutions
Brown - Chemistry: The Central Science 14th Edition
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Brown 14th EditionCh.13 - Properties of Solutions문제 4
13장, 문제 4

Which two statements about gas mixtures are true? [Section 13.1] (a) Gases always mix with other gases because the gas particles are too far apart to feel significant intermolecular attractions or repulsions. (b) Just like water and oil don’t mix in the liquid phase, two gases can be immiscible and not mix in the gas phase. (c) If you cool a gaseous mixture, you will liquefy all the gases at the same temperature. (d) Gases mix in all proportions in part because the entropy of the system increases upon doing so.

검증된 단계별 안내
1
Step 1: Understand the concept of gas mixtures. Gases tend to mix with each other due to their high kinetic energy and the large distances between particles, which minimize intermolecular forces.
Step 2: Evaluate statement (a). Consider the nature of gas particles and their interactions. Gases are generally able to mix because the particles are far apart, reducing the effect of intermolecular forces.
Step 3: Evaluate statement (b). Compare the behavior of gases to liquids like water and oil. Unlike liquids, gases do not have significant intermolecular forces that prevent mixing, so they are typically miscible.
Step 4: Evaluate statement (c). Consider the process of cooling a gas mixture. Different gases have different boiling points, so they do not liquefy at the same temperature.
Step 5: Evaluate statement (d). Consider the role of entropy in gas mixing. Mixing gases increases the disorder or entropy of the system, which is a driving force for mixing.

주요 개념

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Gas Behavior and Mixing

Gases behave differently from liquids and solids due to the large distances between their particles. This spacing allows gas particles to move freely and mix uniformly with other gases. The lack of significant intermolecular forces in gases facilitates this mixing, leading to the conclusion that gases will always mix with one another under normal conditions.
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가이드 코스
01:15
Ideal Gas Law Formula

Entropy and Mixing

Entropy is a measure of the disorder or randomness in a system. When gases mix, the overall entropy of the system increases because the distribution of gas particles becomes more random. This increase in entropy is a driving force for the mixing of gases, as systems tend to evolve towards states of higher entropy.
추천 영상:
가이드 코스
02:46
Entropy in Thermodynamics

Gas Liquefaction

Liquefaction of gases occurs when they are cooled to their condensation points, which can vary for different gases. However, it is incorrect to assume that all gases in a mixture will liquefy at the same temperature, as each gas has its own unique boiling point. Therefore, cooling a gaseous mixture does not guarantee that all components will liquefy simultaneously.
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00:47
Gas Stoichiometry Concepts
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