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Ch.15 - Chemical Equilibrium
Brown - Chemistry: The Central Science 15th Edition
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Brown 15th EditionCh.15 - Chemical Equilibrium문제 69a
15장, 문제 69a

(a) Is the dissociation of fluorine molecules into atomic fluorine, F2(𝑔) ⇌ 2 F(𝑔), an exothermic or endothermic process?

검증된 단계별 안내
1
Identify the type of reaction: The dissociation of fluorine molecules into atomic fluorine is a bond-breaking process.
Recall the general rule that breaking chemical bonds requires energy, while forming chemical bonds releases energy.
Determine the nature of the energy change: Since the reaction involves breaking the F-F bond in F2(g) to form atomic fluorine, energy is absorbed from the surroundings.
Conclude the type of thermodynamic process: If a reaction absorbs energy, it is considered endothermic.
State the answer: The dissociation of fluorine molecules into atomic fluorine is an endothermic process.

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
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3m

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Dissociation Reactions

Dissociation reactions involve the breaking of bonds in a compound to form individual atoms or smaller molecules. In the case of fluorine, the reaction F₂(g) ⇌ 2 F(g) represents the dissociation of diatomic fluorine into two monatomic fluorine atoms. Understanding this process is crucial for determining the energy changes associated with the reaction.
추천 영상:
가이드 코스
04:52
Percent Dissociation Example

Exothermic vs. Endothermic Processes

Exothermic processes release energy, usually in the form of heat, while endothermic processes absorb energy from the surroundings. The classification of a reaction as exothermic or endothermic can be determined by the energy changes that occur during bond breaking and formation. This distinction is essential for analyzing the thermodynamics of the dissociation of fluorine.
추천 영상:
가이드 코스
1:48
Endothermic & Exothermic Reactions Example 2

Bond Energy

Bond energy is the amount of energy required to break a bond between two atoms. In the context of the dissociation of F₂, the bond energy of the F-F bond must be considered to evaluate whether the process is exothermic or endothermic. If the energy required to break the bond is greater than the energy released when forming new bonds, the process is endothermic, and vice versa.
추천 영상:
가이드 코스
01:50
Bond Energy
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교과서 질문

Methanol (CH3OH) can be made by the reaction of CO with H2: CO(𝑔) + 2 H2(𝑔) ⇌ CH3OH(𝑔) (b) To maximize the equilibrium yield of methanol, would you use a high or low temperature?

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교과서 질문

(c) If the temperature is raised by 100 K, does the forward rate constant kf increase by a larger or smaller amount than the reverse rate constant kr?

교과서 질문

Ozone, O3, decomposes to molecular oxygen in the stratosphere according to the reaction 2 O3(𝑔) ⟶ 3 O2(𝑔). Would increasing the pressure by decreasing the size of the reaction vessel favor the formation of ozone or of oxygen?

교과서 질문

(b) If the temperature is raised by 100 K, does the equilibrium constant for this reaction increase or decrease?

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교과서 질문

Methanol (CH3OH) can be made by the reaction of CO with H2: CO(𝑔) + 2 H2(𝑔) ⇌ CH3OH(𝑔) (c) To maximize the equilibrium yield of methanol, would you use a high or low pressure?

435
views