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CHEM 1050 (158)
Lecture

nov. 26th notes

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Department
Chemistry
Course
CHEM 1050
Professor
Mario Monteiro
Semester
Fall

Description
thMon Nov 26 12 CATALYSTS how do they workie Decomposition of H2O2 in H2O2H2O2 2 H2OO2Decomposition of H2O2 in H2O happens very slowly Very high activation energy 75 kJmol But in the presence of iodide ion reaction is faster Therefore it lowered the activation energyCatalysts work by lowering activation energy EA and frequency AHETEROGENEOUS CATALYSTSEx C2H4 ethyleneH2CH3CH3 ethaneEx of heterogeneous catalysts catalytic converter in car COCO2Oxidation of CO to CO2 NON2 Reduction of NO to N2Use noble metals Pt or transition metals for these conversions CuO or Cr2O3 2COO22 CO2 2NON2O2RADIOACTIVE DECAY halflife Different nuclei undergo decay at different speeds Ex Uranium238 is very slow and Sulfur35 is very rapidRadioactive decay is a first order process And each isotope has its own t12 ex Strontium 90 t12 29 yearsone feature of half lives for nuclear decay is that they
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