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How can you test whether the dissolution of a given salt in water is exothermic or endothermic?
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How can you test whether the dissolution of a given salt in water is e...
Testing whether the dissolution of a given salt in water is exothermic or endothermic
Introduction
When a salt is dissolved in water, energy is either released or absorbed. This energy change is known as enthalpy change. If the dissolution of a given salt in water releases energy, it is exothermic. On the other hand, if the dissolution of a given salt in water absorbs energy, it is endothermic.
Methodology
We can test whether the dissolution of a given salt in water is exothermic or endothermic by following these steps:
- Take a known quantity of the salt and weigh it accurately.
- Add the weighed salt into a known quantity of water in a calorimeter. A calorimeter is a device that measures the amount of heat absorbed or released during a chemical reaction or physical change.
- Stir the solution thoroughly and measure the initial temperature of the solution.
- Monitor the temperature of the solution continuously as the salt dissolves in water.
- When the temperature of the solution reaches a constant value, record the final temperature of the solution.
- Calculate the enthalpy change of the salt by using the formula: ΔH = q/m where q is the heat absorbed or released by the solution, m is the mass of the salt, and ΔH is the enthalpy change.
- If the enthalpy change is negative, the dissolution of the salt in water is exothermic. If the enthalpy change is positive, the dissolution of the salt in water is endothermic.
Conclusion
By following the above steps, we can test whether the dissolution of a given salt in water is exothermic or endothermic. This information is important in many chemical and industrial processes, as it can affect the rate and efficiency of these processes.
Community Answer
How can you test whether the dissolution of a given salt in water is e...
We can test this by touch the beaker..If the beaker is hot the rection is exothermic...and If the beaker is cold the the rection is endothermic.....
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How can you test whether the dissolution of a given salt in water is exothermic or endothermic?
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How can you test whether the dissolution of a given salt in water is exothermic or endothermic? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about How can you test whether the dissolution of a given salt in water is exothermic or endothermic? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for How can you test whether the dissolution of a given salt in water is exothermic or endothermic?.
How can you test whether the dissolution of a given salt in water is exothermic or endothermic? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about How can you test whether the dissolution of a given salt in water is exothermic or endothermic? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for How can you test whether the dissolution of a given salt in water is exothermic or endothermic?.
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