Question

ecwer temperature P5-% In order to study the photochemical decay of aqueous bromine in bright sun- light, a small quantity of liquid bromine was dissolved in water contained in a glass battery jar and placed in direct sunlight. The following data were obtained at 25°C: Time (min) 10 20 30 40 50 60 ppm Br2 2.45 1.74 1.23 0.88 0.62 0.44 (a) Determine whether the reaction rate is zero, first, or second order in bro- mine, and calculate the reaction rate constant in units of your choice. (b) Assuming identical exposure conditions, calculate the required hourly rate of injection of bromine (in pounds) into a sunlit body of water 25,000 gal in volume, in order to maintain a sterilizing level of bromine of 1.0 ppm. (Ans.: 0.43 lbm/h) (e) What experimental conditions would you suggest if you were to obtain more data?

Answer 1

1312 15 245 o. 608 0-4参8163 55388501113 13008 6361 514 LO 2183 2041611103 2.5 认|o.qh3h 6.5 ไอ 1 -o.5

varen 0 , 0343 min-1 , 36, 15 min Tace en si 36-15 6,2泊6635.11 Ibl mas svate min netics ame data dan be abla,ned