An iron boiler of mass 180 kg contains 730 kg of water at 11 ∘C.
A heater supplies energy at the rate of 58,000 kJ/h. The specific
heat of iron is 450 J/kg⋅C∘, the specific heat of water is 4186
J/kg⋅C∘, the heat of vaporization of water is 2260 kJ/kg⋅C∘. Assume
that before the water reaches the boiling point, all the heat
energy goes into raising the temperature of the iron or the steam,
and none goes to the vaporization...