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प्रश्न
Explain in brief the involvement of energy in physical and chemical changes.
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उत्तर
Involvement of energy in physical and chemical changes
- Physical changes use energy to change the state of matter,
- Chemical changes release or absorb energy when changing a substance into a new substance.
Energy is released during the decomposition of a substance while energy is absorbed during the formation of a new substance.
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संबंधित प्रश्न
What do you observe when :
a piece of paper is burnt
State whether the following is physical or chemical changes.
Melting of wax —
True or false?
During a physical change energy is either given out or absorbed by the system.
Chemical changes are accompanied by changes in energy.
Distinguish between the following.
Periodic change and non-periodic change
Distinguish between the following.
Natural change and man-made change
Under which different types can the following changes be classified?
Conversion of milk into yoghurt.
Under which different types can the following changes be classified?
Occurrence of an earthquake.
Under which different types can the following changes be classified?
Revolution of the earth around the sun.
What is the change?
