Question

Water is to be heated from 15oc to 65oc as it flows through a 5 m long tube with an internal diameter of 3 cm. The tube is heated with an electric resistance heater that provides uniform heating throughout the surface of the tube. The outer surface is well insulated so that at steady state, all of the heat from the heater is transferred to the water inside the tube. If the system is to provide hot water at a rate of 10l/min, determine the power rating of the resistance

Answer 1

Answer:

Sulfuric acid is sometimes referred to as the “king of chemicals” because it is produced worldwide in such large quantities. In fact, per capita use of sulfuric acid has been taken as one index of the technical development of a country. Annual production in the United States, which is the world’s leading producer, is well over 39 billion kg (86 billion pounds). It is the cheapest bulk acid.