교과서 질문
For the dissolution of LiCl in water, ∆Hsoln = -37 kJ/mol. Which term would you expect to be the largest negative number: ∆Hsolvent, ∆Hsolute, or ∆Hmix?
Ch.13 - Properties of Solutions
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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Table of contents
- Ch.1 - Introduction: Matter, Energy, and Measurement177
- Ch.2 - Atoms, Molecules, and Ions231
- Ch.3 - Chemical Reactions and Reaction Stoichiometry216
- Ch.4 - Reactions in Aqueous Solution189
- Ch.5 - Thermochemistry175
- Ch.6 - Electronic Structure of Atoms168
- Ch.7 - Periodic Properties of the Elements150
- Ch.8 - Basic Concepts of Chemical Bonding177
- Ch.9 - Molecular Geometry and Bonding Theories200
- Ch.10 - Gases179
- Ch.11 - Liquids and Intermolecular Forces113
- Ch.12 - Solids and Modern Materials154
- Ch.13 - Properties of Solutions157
- Ch.14 - Chemical Kinetics199
- Ch.15 - Chemical Equilibrium128
- Ch.16 - Acid-Base Equilibria164
- Ch.17 - Additional Aspects of Aqueous Equilibria163
- Ch.18 - Chemistry of the Environment105
- Ch.19 - Chemical Thermodynamics164
- Ch.20 - Electrochemistry171
- Ch.21 - Nuclear Chemistry122
- Ch.22 - Chemistry of the Nonmetals82
- Ch.23 - Transition Metals and Coordination Chemistry79
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry16
13장, 문제 18a
When ammonium chloride dissolves in water, the solution becomes colder. (a) Is the solution process exothermic or endothermic?
검증된 단계별 안내1
First, let's understand the terms exothermic and endothermic. An exothermic process is one that releases heat into its surroundings, causing the temperature of the surroundings to increase. An endothermic process, on the other hand, absorbs heat from its surroundings, causing the temperature of the surroundings to decrease.
In this case, when ammonium chloride dissolves in water, the solution becomes colder. This indicates that heat is being absorbed from the surroundings (the solution) into the system (the dissolving ammonium chloride).
Therefore, the process of ammonium chloride dissolving in water is an endothermic process.
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주요 개념
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Endothermic and Exothermic Processes
Endothermic processes absorb heat from the surroundings, resulting in a decrease in temperature, while exothermic processes release heat, causing an increase in temperature. In the context of dissolving substances, if the solution becomes colder, it indicates that heat is being absorbed from the surroundings, suggesting an endothermic reaction.
추천 영상:
가이드 코스
01:23
Endothermic & Exothermic Reactions Example 2
Dissolution of Ionic Compounds
When ionic compounds like ammonium chloride dissolve in water, they dissociate into their constituent ions. This process requires energy to overcome the ionic bonds in the solid and to separate the ions, which can lead to a cooling effect if the energy required exceeds the energy released during hydration of the ions.
추천 영상:
가이드 코스
02:11Ionic Compounds Naming
Thermodynamics of Solution Formation
The thermodynamics of solution formation involves the balance between the energy required to break solute-solute and solvent-solvent interactions and the energy released from solute-solvent interactions. If the energy absorbed during the dissolution process is greater than the energy released, the overall process is endothermic, leading to a decrease in temperature of the solution.
추천 영상:
가이드 코스
02:34Enthalpy of Formation
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The first stage of treatment at the reverse osmosis plant in Carlsbad, California, is to flow the water through rock, sand, and gravel as shown here. Would this step remove particulate matter? Would this step remove dissolved salts?
[Section 18.4]
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교과서 질문
When ammonium chloride dissolves in water, the solution becomes colder. (b) Why does the solution form?
1587
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교과서 질문
An ionic compound has a very negative ∆Hsoln in water (b) Which term would you expect to be the largest negative number: ∆Hsolvent, ∆Hsolute, or ∆Hmix?
675
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