Chemistry, 24.08.2019 03:10 drainy0uandthefish
In an electrically heated boiler, water is boiled at 140°c by a 90 cm long, 8 mm diameter horizontal heating element immersed in water. the heating element is made of mechanically polished stainless steel. the boiler initially contains 0.25 m of water at 20°c. once boiling starts, it is observed that 25% of the water in the boiler evaporated in 60 min. i. determine the power rating of the electric heating element immersed in water and the surface temperature of the heating element. [8 marks] ii. using the above heater, estimate the time required to raise the temperature of 0.25 m2 of cold water from 20°c to 140°c
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In an electrically heated boiler, water is boiled at 140°c by a 90 cm long, 8 mm diameter horizontal...
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