A surface condenser receives steam at a rate of 100 kg per minute. The vacuum reading is 670 mmHg and the barometer reading is 760 mmHg. The air pump temperature is 38 C and the condensate temperature is 42,7 C. The cooling water enters at 21,1 C and leaves at 40 C. The gas constant is 287 J/kg.K and the specific heat capacity of water is 4,187 kJ/kg C. Calculate the following: 4.1 The absolute pressure of the steam in the condenser (2) 4.2 The amount of cooling water required in kg per second 4.3 The mass of air in kg in the condenser if the capacity is 2 m3 4.4 The mass of air in kg if the capacity is increased by 0,5 m (4) By how many kilograms has the mass of air increased due to the rise in the capacity of air 4.5 (2)