Heating Water at 90C: Why It Takes Longer Than Lower Temps

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Heating water to 90C takes longer than heating it to lower temperatures like 70C due to the principles of heat transfer and specific heat capacity. Water has a high specific heat capacity, meaning it requires a significant amount of energy to increase its temperature, especially as it approaches boiling point. The energy needed to raise the temperature from a lower initial point to a higher set point increases with the temperature difference. Additionally, the rate of heat transfer can decrease as the temperature difference between the water and the heat source narrows. Understanding these factors is essential for grasping why higher temperatures require more time to achieve.
darkmagic
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Why heating water at 90C takes longer than heating water at lower temperatures such as 70C?
 
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I never heard of this before. But I can't give you an answer since I don't know much about heat transfer.
 
Because a lower initial temperature requires more energy to reach a set point? Water heats linearly (generally) between 0C and 100C (STP) ... 4186j/C or so.
 
You need to show your work. We cannot give you answers.

Why do you think it takes longer?
 
does the specific heat capacity has something to do with this?
 

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