Question

Which of the following is a precautionary step in experiment for heat of displacement? ​

Answer 1

Explanation:

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Answer 2

Heat of displacement

Explanation:

• Heat is changed when a more electropositive metal displaces a lesser electropositive metal from any solution of its salt - this results in heat of displacement.
• The heat of displacement can also be defined as the heat change which occurs when one mole of a metal is displaced from its salt solution.
• Precautions that should be taken are :

1. Metals taking part in the reaction should be in the powdered form, so that time taken for the reaction is less and lesser heat is lost to the surroundings.
2. The metals should be added quickly to the solution to make sure less heat loss occurs.  
3. The temperature of the solution should be kept uniform for which the reaction should be stirred slowly.
4. Thermometer reading should be recorded carefully to ensure the reactions are completed.