Question

9• Give an small activity to show that heat can change the states of a substance.​

Answer 1

Answer:

To show - A substance absorbs heat during melting without change in its temperature.

Procedure - Take 150g of ice in a beaker and suspend a laboratory thermometer so that the bulb is in contact with ice. Start heating and note the temperature when the ice starts melting. Finally, note the temperature when all the ice is completely melted.

Observation - There is no change in the temperature during the change of state from solid to liquid. As we know that for the change of state, heat is required thus substances absorb heat during melting without change in its temperature.

Explanation:

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