Calculate the following:
3.7.1 The quantity of heat lost by the ball if its initial temperature is
\[
800^{\circ} \mathrm{C}
\]
3.7.2 The mass of the oil
(3)
3.8 Steam is generated in a boiler at a pressure of 1450 kpa and a wet steam is generated with a dryness fraction of \( 0,9 \).
Calculate the enthalpy required for 1 kg of the following:
3.8.1 Wet steam
(3)
3.8.2 Dry steam
(1)
3.9 3.9.1 State ONE advantage of steam
3.9.2 State ONE disadvantage of steam
(1)
(1)
3.10 Calculate the total enthalpy in MJ required to produce 3 kg of wet steam with a dryness fraction of 0,82 and at a pressure of 1000 kPa .
(3)
3.11 The total enthalpy of 1 kg of wet steam is \( 2465,563 \mathrm{~kJ} \) under a pressure of
(3) 2300 kPa .
[33]