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level: Endothermic and Exothermic Reactions

Questions and Answers List

level questions: Endothermic and Exothermic Reactions

QuestionAnswer
A chemical reaction that releases heat energy to the surroundings.Exothermic Reaction
What characterizes an exothermic reaction in terms of energy transfer?An exothermic reaction releases heat energy to the surroundings.
The principle stating that the total amount of energy before a reaction is equal to the total amount of energy after the reaction.Energy Conservation in Reactions
What does the principle of energy conservation state in the context of chemical reactions?The total energy before a reaction is always the same as the total energy after the reaction, indicating that energy is conserved.
The consequence of exothermic reactions, where the temperature of the surroundings increases.Temperature Increase in Exothermic Reactions
What happens to the temperature of the surroundings in exothermic reactions?The temperature of the surroundings increases in exothermic reactions as they release heat energy.
Specific types of reactions that release heat energy to the surroundings, including combustion, neutralization, and displacement reactions.Examples of Exothermic Reactions
Name some examples of reactions categorized as exothermic.Examples include combustion (burning), neutralization reactions, and displacement reactions.
Instances where exothermic reactions are utilized in practical situations, such as hand warmers and self-heating cans.Everyday Applications of Exothermic Reactions
How are exothermic reactions applied in everyday life, providing specific examples?Exothermic reactions are utilized in everyday life, as seen in hand warmers and self-heating cans.
A chemical reaction that absorbs energy from the surroundings.Endothermic Reaction
What defines an endothermic reaction in terms of energy transfer?An endothermic reaction absorbs energy from the surroundings.
The consequence of endothermic reactions, where the temperature of the surroundings decreases.Temperature Decrease in Endothermic Reactions
What happens to the temperature of the surroundings in endothermic reactions?The temperature of the surroundings decreases in endothermic reactions as they absorb energy.
Specific reactions that absorb energy from the surroundings, including the reaction between citric acid and sodium hydrogencarbonate and thermal decomposition.Examples of Endothermic Reactions
Provide examples of reactions classified as endothermic.Examples include the reaction between citric acid and sodium hydrogencarbonate and thermal decomposition.
The process where a compound breaks down when heated, often exemplifying an endothermic reaction.Thermal Decomposition
What is thermal decomposition, and how is it related to endothermic reactions?Thermal decomposition is the breakdown of a compound when heated and is often an example of an endothermic reaction.
Instances where endothermic reactions find practical use in daily life, such as in cold packs for sports injuries.Everyday Applications of Endothermic Reactions
How are endothermic reactions applied in everyday life, providing a specific example?Some cold packs for sports injuries use endothermic reactions, demonstrating their practical application.
The process where salts, such as copper sulfate or ammonium chloride, dissolve in water, and the nature of this process can be either exothermic or endothermic.Salts Dissolving in Water
Is the dissolution of salts in water always exothermic or endothermic, or does it depend on the specific salt?The nature of the dissolution process depends on the specific salt; for example, copper sulfate dissolution is exothermic, while ammonium chloride dissolution is endothermic.
The process of salts dissolving in water, such as copper sulfate, where heat is released to the surroundings.Exothermic Dissolution
What characterizes exothermic dissolution of salts in water?Exothermic dissolution, like that of copper sulfate, releases heat to the surroundings.
The process of salts dissolving in water, such as ammonium chloride, where heat is absorbed from the surroundings.Endothermic Dissolution
What characterizes endothermic dissolution of salts in water?Endothermic dissolution, like that of ammonium chloride, absorbs heat from the surroundings.
Chemical reactions where two solutions react to form an insoluble solid (precipitate) and the nature of these reactions can be either exothermic or endothermic.Precipitation Reactions
What defines precipitation reactions, and can they be both exothermic and endothermic?Precipitation reactions involve the formation of an insoluble solid; their nature can be either exothermic or endothermic depending on the specific reaction.
An instance of a precipitation reaction, such as the reaction between silver nitrate and sodium chloride, where the process is exothermic.Example of Exothermic Precipitation Reaction
Provide an example of a precipitation reaction that is exothermic.The reaction between silver nitrate and sodium chloride, forming a silver chloride precipitate, is an example of an exothermic precipitation reaction.
A method to determine whether a reaction is exothermic or endothermic by measuring the temperature change during the reaction.Experimental Determination of Reaction Nature
How can you experimentally determine if a reaction is exothermic or endothermic?Measure the temperature change during the reaction; if it increases, it's exothermic, and if it decreases, it's endothermic.