The heating curve below illustrates the changes in the physical states of water at different temperature.
What is the physical state of water at room temperature (25 $°$ C)?

Gas

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Can’t say

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Solid

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Liquid

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Solution

The correct option is D Liquid
The graph above shows the heating curve of water. One can plot heating curves by measuring the increase in temperature of a given amount of ice, water or steam as a function of heat that is added at a constant rate.

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