Heat transfer in steam heater. water at an average of 70°f is flowing in a 2-in. steel pipe, schedule 40. steam at 220°f is condensing on the outside of the pipe. the con- vective coefficient for the water inside the pipe is h = 500 btu/h ft. 'f and the con- densing steam cocfficient on the outside is h = 1500 (a) calculate the heat loss per unit length of 1 ft of pipe using resistances. (b) repeat, using the overall u based on the inside area ar (c) repeat, using u ans.(a)q= 26 710 btu/h (7.828 kw). (b) u, = 329.1 btu/h-ft. com (1869 w/m².k), (c) u.= 286.4 btu/h. eta . °f (1626 w/m²k)

a graduated cylinder.

explanation:

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.