Selina solutions

Selina solutions

Grade 8

Matter | Short/Long Answer Questions

Question 11

Q11) Describe an experiment to demonstrate that a substance absorbs heat during melting without change in its temperature.

Solution:

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.

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subject-cta

Question 11

Q11) Describe an experiment to demonstrate that a substance absorbs heat during melting without change in its temperature.

Solution:

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.

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subject-cta
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