A jacketed kettle is used for concentrating 1,000 lbmass/h of an aqueous salt solution using steam at 250°F. The concentrated solution boils at 220°F and has a latent heat of 965 Btu/lbmass. The vessel is made of steel [k = 35 Btu/(h ftoF)] 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 [k = 220 Btu/(h ftoF)].
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