Domanda del libro di testo
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
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement146
- Ch.2 - Atoms, Molecules, and Ions200
- Ch.3 - Chemical Reactions and Reaction Stoichiometry176
- Ch.4 - Reactions in Aqueous Solution155
- Ch.5 - Thermochemistry126
- Ch.6 - Electronic Structure of Atoms131
- Ch.7 - Periodic Properties of the Elements126
- Ch.8 - Basic Concepts of Chemical Bonding123
- Ch.9 - Molecular Geometry and Bonding Theories143
- Ch.10 - Gases147
- Ch.11 - Liquids and Intermolecular Forces91
- Ch.12 - Solids and Modern Materials122
- Ch.13 - Properties of Solutions126
- Ch.14 - Chemical Kinetics174
- Ch.15 - Chemical Equilibrium101
- Ch.16 - Acid-Base Equilibria139
- Ch.17 - Additional Aspects of Aqueous Equilibria146
- Ch.18 - Chemistry of the Environment72
- Ch.19 - Chemical Thermodynamics129
- Ch.20 - Electrochemistry142
- Ch.21 - Nuclear Chemistry101
- Ch.22 - Chemistry of the Nonmetals68
- Ch.23 - Transition Metals and Coordination Chemistry66
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry10
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Non è quello che usi tu?Cambia libro di testo
Capitolo 13, Problema 18a
When ammonium chloride dissolves in water, the solution becomes colder. (a) Is the solution process exothermic or endothermic?
Guida verificata passo dopo passo1
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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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.
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Percorso guidato
1:48
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.
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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.
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02:34Enthalpy of Formation
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