Is My Graph of Temperature vs. Time Correct for Heated Water with Constant Mass?

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zabachi
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A question came for my physics exam that water was being heated and the graph showed that the mass of water remained constant from 25 degree celsius to 100 degree celsius and then started decreasing in mass. The question asked to draw a graph of temperature against time and i drew the temperature increasing for the amount of time that the mass of water remained constant. Is that correct?
 
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Yes, what you drew was correct. The water heats to the boiling point so the temperature rises. Once 100 C is reached, the temperature will remain constant as all the energy of heating is consumed by the water changing phase from liquid to vapor.