Movement of energy from one system to another with physical and chemical change
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it is physical change because energy remain constant,
we also say that it's a chemical change because we use it in different type and it cannot be reversible for exampletake hundred ml of water which has a temperature of 75 Celsius degree and leave it in a room where the temperature is 25 Celsius degree. so so now what you observe???is there any way of collecting all the heat lost to the environment and making the water hot once it has cool down??? Sony this way we can say that energy is a chemical change......
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It is due to physical changes
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