Question
Endothermic reaction are always:
- Irreversible
- Spontaneous
- Non-spontaneous
- Reversible
Hint:
Endothermic reactions need energy from the surroundings. More the heat faster the reaction.
The correct answer is: Non-spontaneous
- Most endothermic reactions are not spontaneous. Without a steady supply of energy, the reaction usually stops. For example, the electrolytic decomposition of water into hydrogen and oxygen gases is an endothermic reaction.
- This reaction produces gas only while the current is flowing. In endothermic reactions, the enthalpy usually increases.
- However, spontaneous endothermic reactions can occur when the Gibbs free energy becomes negative due to changes in enthalpy and entropy.
- An endothermic reaction can be spontaneous if the entropy increases beyond the change in enthalpy.
Related Questions to study
__________ is the chemical process in which substance combines with oxygen to gives off heat.
__________ is the chemical process in which substance combines with oxygen to gives off heat.
In the endothermic reaction temperature of surrounding keeps _______.
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A sample of acid and alkali reacts together. The temperature increases by 25℃. The nature of this reaction is:
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Which of the following picture depict the exothermic reaction?
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Which of the following Reaction that gives out the energy to the surrounding?
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The substance changes its shape, size, and color is one of the properties of physical change
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The substance changes its shape, size, and color is one of the properties of physical change
A usually reversible change in the physical properties of a substance, as size or shape or colour is known as physical change.
The curdling of milk is where lumps are formed in the milk.
lumps are formed when milk curdles.
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lumps are formed when milk curdles.
burning is the example of irreversible change.
Curdling is the example of chemical change, in which milk forms lumps.
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burning is the example of irreversible change.
Curdling is the example of chemical change, in which milk forms lumps.
Rusting is the process where iron changes its colour to reddish brown colour.
Digestion is the change where the substance goes into the stomach and breaks down into simpler substances.
Which of the following is not an example of chemical change?
chopping of vegetables is an example of physical change
Which of the following is not an example of chemical change?
chopping of vegetables is an example of physical change
The reaction in which one or more substances combine or change into one or more substances or a new substance is known as a
A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another.
The reaction in which one or more substances combine or change into one or more substances or a new substance is known as a
A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another.
Pick the odd one out:
it is an example of slow change while others are an example of fast change.
Pick the odd one out:
it is an example of slow change while others are an example of fast change.
Which of the following vegetables change their color when exposed to air?
Which of the following vegetables change their color when exposed to air?
Match the following:
Match the following:
The substance where no new substance is formed is called
physical change is where no new substance is formed.
The substance where no new substance is formed is called
physical change is where no new substance is formed.
