a) You would like to heat 10 litres of tap water initially at room temperature using an old 2 kW heater that has an effi

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a)
You would like
to heat 10 litres of tap water initially at room
temperature
using an old 2 kW
heater that has an efficieny of 70%. Estimate the temperature of
the water after 20 minutes stating any assumptions
made.
(5 marks)
b)
Determine the amount of heat needed to completely
transform 1 g of water at 15°C to
steam at 115°C.
(Obtain any relevant data that you need from the
internet. Cite the source of that data in your
answer)
(5 marks)