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Ch.5 - Thermochemistry
Brown - Chemistry: The Central Science 15th Edition
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Brown 15th EditionCh.5 - Thermochemistry문제 40b
5장, 문제 40b

The decomposition of Ca(OH)2 into CaO(s) and H2O at constant pressure requires the addition of 109 kJ of heat per mole of Ca(OH)2 . b. Draw an enthalpy diagram for the reaction.

검증된 단계별 안내
1
Draw a horizontal line to represent the enthalpy level of the reactants, Ca(OH)_2.
Since the reaction is endothermic, draw an upward arrow from the reactants' line to indicate the absorption of heat.
Label the upward arrow with the amount of heat absorbed, 109 kJ/mol.
Draw another horizontal line above the reactants' line to represent the enthalpy level of the products, CaO and H_2O.
Label the products' line with the chemical formulas of the products, CaO(s) and H_2O(g).

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
5m

주요 개념

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

Enthalpy (ΔH)

Enthalpy is a thermodynamic property that represents the total heat content of a system at constant pressure. It is defined as the sum of the internal energy and the product of pressure and volume. In chemical reactions, the change in enthalpy (ΔH) indicates whether a reaction is exothermic (releases heat) or endothermic (absorbs heat), which is crucial for understanding the energy changes during the decomposition of Ca(OH)₂.
추천 영상:
가이드 코스
02:34
Enthalpy of Formation

Decomposition Reaction

A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler products. In this case, calcium hydroxide (Ca(OH)₂) decomposes into calcium oxide (CaO) and water (H₂O). Understanding the nature of decomposition reactions helps in predicting the products and the energy changes involved, such as the heat required for the reaction to proceed.
추천 영상:
가이드 코스
01:30
Alcohol Reactions: Dehydration Reactions

Enthalpy Diagram

An enthalpy diagram, or reaction coordinate diagram, visually represents the energy changes during a chemical reaction. It typically shows the enthalpy of the reactants and products, along with the activation energy and the overall change in enthalpy (ΔH). For the decomposition of Ca(OH)₂, the diagram would illustrate the energy input required (109 kJ) to break the bonds in the reactant, leading to the formation of products at a higher energy level.
추천 영상:
가이드 코스
02:34
Enthalpy of Formation
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