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Question
How many processes shown in the following images are endothermic?
- 2
- 2
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Solution
The correct option is A 2
Figure 1 shows melting of ice. During melting, the water absorbs heat and changes its state from solid to liquid. Therefore, it is an endothermic process.
Figure 2 shows dew drops on the leaf. Formation of dew involves the process of condensation in which the water loses (or liberates) heat and changes its state from gas to liquid. Therefore, it is an exothermic process.
Figure 3 shows bursting of crackers. Since a large amount of heat is liberated during bursting of crackers, it is an exothermic process.
Figure 4 shows boiling of water. During boiling, the water absorbs heat and changes its state from liquid to gas. Therefore, it is an endothermic process.
Figure 1 shows melting of ice. During melting, the water absorbs heat and changes its state from solid to liquid. Therefore, it is an endothermic process.
Figure 2 shows dew drops on the leaf. Formation of dew involves the process of condensation in which the water loses (or liberates) heat and changes its state from gas to liquid. Therefore, it is an exothermic process.
Figure 3 shows bursting of crackers. Since a large amount of heat is liberated during bursting of crackers, it is an exothermic process.
Figure 4 shows boiling of water. During boiling, the water absorbs heat and changes its state from liquid to gas. Therefore, it is an endothermic process.
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