Problem 68E
The following is a quote from an article in the August 18, 1998, issue of The New York Timesabout the breakdown of cellulose and starch: “A drop of 18 degrees Fahrenheit [from to ] lowers the reaction rate six times; a 36-degree drop [from ] produces a fortyfold decrease in the rate.” (a) Calculate activation energies for the breakdown process based on the two estimates of the effect of temperature on rate. Are the values consistent? (b)Assuming the value of calculated from the 36-degree drop and that the rate of breakdown is first order with a half-life at of 2.7 years, calculate the half-life for breakdown at a temperature of -15 °C.
1 Plsc 101 Exam 3 Fertilizers 67 pH optimum uptake in soil Fertilizer Formulations liquid soluble forms solution in water; applied directly to plants and available immediately two slow release types: granular granules; noncoated; evenly spread around plants water aids breakdown of some medium vs. coarse grade & longevity coated coated with a plastic or sulfur moisture or temp activated ex: Osmocote® uses a porous plastic resin 201020: 20% nitrogen; 10% phosphate; 20% pot
