| OCR Text |
Show - gas reaction and developed a 28 - theory which shows the velocity to be in fluenced by diffusion of the gaseous product through the solid 2 phase, One possibility decomposition" rounding is discussed in of silver carbonate case the carbon dioxide is not able to escape oxide fast enough tion of gas in the reaction creasing which, in the to prevent accumulation of zone through the sur local concentra a until the rate of diffusion balances the de rate of gas for matton, In his systems he was not able to elimin ate water vapor and considered that the water vapor concentration con trolled the diffusion rate, Dehydration Garner and an of copper sulfate Tanner(25) initial induction pentahydrate and Hume and Colvin, period (26) has been discussed The former claim that is due to the slow rate of nuclei formation while the latter concludes that the rate of nucleation is high, the recognized decomposition layer action on of the reaction were of known area and Effects of controlled Both groups studied the atmospheres narrow on the re not discussed, Perhaps carbonate crystals zone. by the most extensive work of decomposition of papers have been is that led published by a nature similar to the calcium by Cremer at Innesbruck, her and fellow workers on A number magnesite decomposition. (27) In every The case decomposition by allowing reported powdered magnesium carbonate was followed at constant pressure for any the carbon dtoxtde to expand into an was used, temperature enlarging chamber, |
