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If you pour a few drops of petrol on your palm, it will feel cool as the drops evaporate. This change is a/an:
- a)Chemical change
- b)Exothermic change
- c)Slow reaction
- d)Endothermic change
Correct answer is option 'D'. Can you explain this answer?
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If you pour a few drops of petrol on your palm, it will feel cool as t...
Endothermic Change Explanation:
The sensation of coolness felt when a few drops of petrol are poured on the palm and evaporate is an example of an endothermic change.
Here's why:
Evaporation Process:
- When petrol is poured on the palm, the drops start to evaporate.
- Evaporation is a process in which molecules in a liquid gain enough energy to break free from the liquid and turn into a gas.
- In this case, the energy required for the petrol molecules to evaporate is taken from the heat of the palm, leading to a decrease in the temperature of the palm.
Endothermic Change:
- An endothermic change is a process that absorbs energy from its surroundings in the form of heat.
- In this scenario, the evaporation of petrol on the palm absorbs heat energy from the palm to provide the necessary energy for the molecules to transition from a liquid to a gas.
- As a result, the palm feels cooler as the heat is drawn from it during the evaporation process.
Conclusion:
In summary, the cool sensation felt when a few drops of petrol are poured on the palm and evaporate is due to the endothermic nature of the evaporation process. The heat from the palm is absorbed during evaporation, leading to a decrease in temperature and the perception of coolness.
The sensation of coolness felt when a few drops of petrol are poured on the palm and evaporate is an example of an endothermic change.
Here's why:
Evaporation Process:
- When petrol is poured on the palm, the drops start to evaporate.
- Evaporation is a process in which molecules in a liquid gain enough energy to break free from the liquid and turn into a gas.
- In this case, the energy required for the petrol molecules to evaporate is taken from the heat of the palm, leading to a decrease in the temperature of the palm.
Endothermic Change:
- An endothermic change is a process that absorbs energy from its surroundings in the form of heat.
- In this scenario, the evaporation of petrol on the palm absorbs heat energy from the palm to provide the necessary energy for the molecules to transition from a liquid to a gas.
- As a result, the palm feels cooler as the heat is drawn from it during the evaporation process.
Conclusion:
In summary, the cool sensation felt when a few drops of petrol are poured on the palm and evaporate is due to the endothermic nature of the evaporation process. The heat from the palm is absorbed during evaporation, leading to a decrease in temperature and the perception of coolness.
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If you pour a few drops of petrol on your palm, it will feel cool as t...
Endothermic change
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If you pour a few drops of petrol on your palm, it will feel cool as the drops evaporate. This change is a/an:a)Chemical changeb)Exothermic changec)Slow reactiond)Endothermic changeCorrect answer is option 'D'. Can you explain this answer?
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