Domanda del libro di testo
Calculate ∆H° for the following reactions.
(c) CH3CH3 + HOOH → CH3CH2OH + H2O
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Ch. 5 - Chemical Reaction Analysis: Thermodynamics and Kinetics
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471
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TOC.tableOfContents
- Ch. 2 - General Chemistry Translated: Finding the Electrons114
- Ch. 3 - Alkanes and Cycloalkanes: Properties and Conformational Analysis109
- Ch. 4 - Acids and Bases/Electron Flow144
- Ch. 5 - Chemical Reaction Analysis: Thermodynamics and Kinetics118
- Ch. 6 - Stereoisomerism: Arrangement of Atoms in Space112
- Ch. 7 - Principles of Green (Organic) Chemistry3
- Ch. 8 - Alkenes 1: Properties and Electrophilic Additions158
- Ch. 9 - Alkenes 2: Oxidation and Reduction150
- Ch. 10 - Alkynes: Electrophilic Addition and Redox Reactions101
- Ch. 11 - Properties and Synthesis of Alkyl Halides: Radical Reactions108
- Ch. 12 - Substitution and Elimination: Reactions of Haloalkanes172
- Ch. 13 - Alcohols, Ethers and Related Compounds: Substitution and Elimination239
- Ch. 14 - Structural Identification 1: Infrared Spectroscopy and Mass Spectrometry54
- Ch. 15 - Structural Identification 2: Nuclear Magnetic Resonance Spectroscopy93
- Ch. 16 - Metals in Organic Chemistry48
- Ch. 17 - Carbonyl Addition Reactions: Aldehydes and Ketones45
- Ch. 18 - Nucleophilic Acyl Substitution 1: Carboxylic Acids18
- Ch. 19 - Nucleophilic Acyl Substitution 2: Carboxylic Acid Derivatives39
- Ch. 20 - Enolates: Carbonyl Addition and Substitution13
- Ch. 21 - Conjugated Systems 1: Stability and Addition Reactions56
- Ch. 22 - Conjugated Systems 2: Pericyclic Reactions54
- Ch. 23 - Benzene 1: Aromatic Stability and Substitution Reactions64
- Ch. 24 - Benzene 2: Reactions Influenced by the Aromatic Ring62
- Ch. 25 - Amines: Structure, Reactions, and Synthesis27
- Ch. 26 - Amino Acids, Proteins, and Peptide Synthesis9
- Ch. 27 - Carbohydrates, Nucleic Acids, and Lipids54
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471Non è quello che usi tu?Cambia libro di testo
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Mullins 1st EditionCh. 5 - Chemical Reaction Analysis: Thermodynamics and KineticsProblema 36
Mullins 1st EditionCh. 5 - Chemical Reaction Analysis: Thermodynamics and KineticsProblema 36Capitolo 4, Problema 36
Third-order reactions are rare. Why do you think that is?
Guida verificata passo dopo passo1
Understand the concept of reaction order: The order of a reaction refers to the sum of the exponents of the concentration terms in the rate law. A third-order reaction would involve three reactant molecules colliding simultaneously in a single step.
Consider the probability of molecular collisions: For a third-order reaction to occur, three molecules must collide at the same time and in the correct orientation. The probability of such a simultaneous collision is extremely low compared to two-molecule collisions (second-order reactions).
Analyze the energy requirements: In addition to the low probability of collision, the activation energy required for three molecules to react simultaneously is typically much higher, making such reactions less favorable under normal conditions.
Examine experimental observations: Third-order reactions are rarely observed in practice because the reaction mechanism often involves sequential steps (e.g., two second-order reactions) rather than a single step involving three molecules.
Conclude with the rarity of third-order reactions: Due to the low probability of simultaneous collisions, high energy requirements, and the tendency for reactions to proceed via simpler mechanisms, third-order reactions are uncommon in organic chemistry.
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Reaction Order
Reaction order refers to the power to which the concentration of a reactant is raised in the rate law of a chemical reaction. It indicates how the rate of reaction depends on the concentration of reactants. For example, a first-order reaction depends linearly on one reactant's concentration, while a second-order reaction depends on the square of the concentration of one reactant or the product of two reactants' concentrations.
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Molecularity
Molecularity is the number of reactant molecules involved in an elementary reaction step. It can be unimolecular (one molecule), bimolecular (two molecules), or termolecular (three molecules). Third-order reactions, which are termolecular, require simultaneous collisions between three reactant molecules, making them statistically less likely to occur compared to reactions with lower molecularity.
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Collision Theory
Collision theory posits that for a reaction to occur, reactant molecules must collide with sufficient energy and proper orientation. The likelihood of effective collisions decreases as the number of molecules involved increases. Therefore, third-order reactions are rare because the probability of three molecules colliding simultaneously with the right conditions is significantly lower than for reactions involving one or two molecules.
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Calculate ∆H° for the following reactions.
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