Question 3. Why does our palm feel cold when we put some acetone or petrol or perfume on it?
Answer: When we put some acetone, petrol or perfume it starts evaporating by using the energy from palm and leaving it cool.
Answer: When we put some acetone, petrol or perfume it starts evaporating by using the energy from palm and leaving it cool.
We feel cool because acetone is a volatile substance and it evaporates rapidly by taking energy from our hands and evaporation causes cooling
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ReplyDeletethanks , but actual answer is We feel cool because acetone is a volatile substance and it evaporates rapidly by taking energy from our hands and evaporation causes cooling , for more info you can checkout my youtube channel sri nerd
ReplyDeletethanks , but actual answer is We feel cool because acetone is a volatile substance and it evaporates rapidly by taking energy from our hands and evaporation causes cooling , for more info you can checkout my youtube channel sri nerd
ReplyDeleteAll the ans are correct
ReplyDeleteAll the ans are correct
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ReplyDeleteThis is wrong actual answer is we feel cold because perfume , petrol are cold substace and have less humidity
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ReplyDeleteThese all are wrong answer .The correct answer is -when we put some acetone or petrol or perfume on our palm, it evaporates. During evaporation ,particles of the liquid absorb energy from the surrounding or the surface of the palm to compensate for the loss of energy, making the surrounding cool.
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ReplyDeleteEvaporation causes cooling, that's the reason, substances that evaporation rate high, cause high cooling effect. Gasoline,perfume etc have low boiling point, evaporates quickly and hence suck heat energy as fast as possible, and hence cause cooling .
ReplyDeleteThere are some pore in earthen through which the liquid inside the pots evaporate. This evaporation makes the water in the pot cool. In this way, water catch in an earthen became cool during summer
ReplyDeleteI feel it's perfect for this type of question
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