An electric kettle is left on for two minutes after it starts boiling. How much mass of the water has boiled off at this time
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Here’s a nice question that gauges your understanding of the Physics of boiling a kettle which a few of my students found tricky.
We have a 2.2 kW kettle containing 0.5 kg of water at 20oC. The kettle is switched on for 3 minutes. What mass of water remains in the kettle at the end of this time? The specific heat capacity of water is 4186 J kg-1 K-1 and its specific latent heat of vaporisation is 2.26 MJ kg-1
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