Question: A jacketed kettle is used for concentrating 1,OOO lbmasdh of an aqueous salt solution using steam at 250°F. The concentrated solution boils at 220°F and has a latent heat of 965 Btuhbmass. The vessel is made of steel [k = 35 Btu/(h ft OF)] and is 1/4 in. thick. Determine the increase in capacity that might be expected if the kettle were replaced by one made of copper F = 220 Btu/(h ft OF)].