When water is heated from room temperature to 100 degrees, can the amount of evaporation be ignored?
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Question: When heating the water in a container (not circulating water) from 20 degrees Celsius at room temperature to 100 degrees Celsius where it boils, what is the approximate amount of evaporation that occurs before boiling? When calculating the heat generated during this process, we often use the formula Q = latent heat of vaporization * mass of water + specific heat capacity of water * mass of water * (100 – 20). However, this formula ignores the heat lost due to evaporation before boiling. Can this amount of evaporation be ignored? Is there a formula to calculate the amount of evaporation before water boils? Thank you!
It can be ignored, as there is no evaporation; only a process of heat absorption occurs.
It can generally be ignored.