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darkmagic
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Why heating water at 90C takes longer than heating water at lower temperatures such as 70C?
Heating water at 90C takes longer because the specific heat capacity of water increases as the temperature rises. This means that it takes more energy to raise the temperature of water at 90C compared to water at lower temperatures.
The rate of heat transfer is slower at 90C compared to lower temperatures because the temperature difference between the water and its surroundings is smaller. This results in a smaller temperature gradient, which leads to a slower transfer of heat.
Yes, at 90C water undergoes a phase change from liquid to gas, which requires a significant amount of energy. This energy is used to break the hydrogen bonds between water molecules and convert them into water vapor, resulting in a slower heating process.
Yes, the type of container can affect the heating time of water at 90C. Materials with higher thermal conductivity, such as metal, will transfer heat more efficiently and therefore heat the water faster compared to materials with lower thermal conductivity, such as glass.
Yes, atmospheric pressure can affect the boiling point of water, which in turn can impact the heating time at 90C. Higher atmospheric pressure can increase the boiling point of water, making it take longer to reach 90C and therefore increasing the overall heating time.