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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 39b
5장, 문제 39b

The complete combustion of ethanol, C2H5OH(l), to form H2O(g) and CO2(g) at constant pressure releases 1235 kJ of heat per mole of C2H5OH. b. Draw an enthalpy diagram for the reaction.

검증된 단계별 안내
1
Draw a horizontal line to represent the enthalpy level of the reactants, C_2H_5OH(l) and O_2(g).
Draw another horizontal line below the reactants' line to represent the enthalpy level of the products, H_2O(g) and CO_2(g).
Label the reactants' line with 'Reactants: C_2H_5OH(l) + O_2(g)' and the products' line with 'Products: H_2O(g) + CO_2(g)'.
Draw a vertical arrow pointing downward from the reactants' line to the products' line to indicate the release of energy.
Label the arrow with '-1235 kJ/mol' to indicate the exothermic nature of the reaction, as energy is released.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
2m

주요 개념

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

Combustion Reaction

A combustion reaction is a chemical process in which a substance reacts rapidly with oxygen, producing heat and light. In the case of ethanol, C2H5OH, its combustion results in the formation of carbon dioxide (CO2) and water (H2O), releasing energy. Understanding this reaction is crucial for analyzing energy changes and the products formed during combustion.
추천 영상:
가이드 코스
02:24
Combustion Apparatus

Enthalpy Change

Enthalpy change (ΔH) refers to the heat content change of a system at constant pressure during a chemical reaction. For the combustion of ethanol, the enthalpy change is negative, indicating that the reaction is exothermic, as it releases 1235 kJ of heat per mole. This concept is essential for interpreting energy diagrams and understanding the thermodynamics of the reaction.
추천 영상:
가이드 코스
02:34
Enthalpy of Formation

Enthalpy Diagram

An enthalpy diagram visually represents the energy changes during a chemical reaction. It typically shows the enthalpy of reactants and products, along with the enthalpy change (ΔH). For the combustion of ethanol, the diagram would illustrate the decrease in enthalpy as the reactants convert to products, highlighting the energy released in the process.
추천 영상:
가이드 코스
02:34
Enthalpy of Formation
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교과서 질문

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