A distillation column is used to separate a mixture of propanol and water. The details of the feed, distillate and residue can be found in the following table: Alimentation 1000 10 90 20 Residue 873 1 Mass flow (kg/h) % propane (m%) %water (m%) Temperature (C) Specific heat (kJ/kgC). Distilled 127 72 28 87.8 3.80 99 99.5 4.19 3 15.3 tons of cooling water per hour are used in the condenser. Temperature cooling water inlet temperature is 16.0 C. The outlet temperature is 20.0 C. On the kettle uses saturated steam at 157.3 C. How many kg of steam are needed per hour