In the batch preparation of an aqueous solution, the water is first heated to 80C in a

Question:

In the batch preparation of an aqueous solution, the water is first heated to 80°C in a jacketed, agitated vessel; 1000 Imp. gal. (4545 kg) is heated from 15°C. If the jacket area is 300 ft² (27.9 m² ) and the overall heat-transfer coefficient can be taken as 50 Btu ft^-² h^-¹°F^-¹ (285 W m^-² K^-¹ ), estimate the heating time. Steam is supplied at 25 psig (2.7 bar).