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- https://chem.libretexts.org/Courses/Prince_Georges_Community_College/CHEM_2000%3A_Chemistry_for_Engineers_(Sinex)/Unit_4%3A_Nomenclature_and_Reactions/Chapter_11%3A_Stoichiometry/Chapter_11.6%3A__Types_of_Chemical_ReactionsChemical processes in industry rely heavily on the use of catalysts, which are usually added to a reaction mixture in trace amounts, and most biological reactions do not take place without a biologica...Chemical processes in industry rely heavily on the use of catalysts, which are usually added to a reaction mixture in trace amounts, and most biological reactions do not take place without a biological catalyst or enzymeCatalysts that occur naturally in living organisms and catalyze biological reactions.. Examples of catalyzed reactions in industry are the use of platinum in petroleum cracking and reforming, the reaction of SO 2 and O 2 in the presence of V 2 O 5 to produce SO 3 in the industri…
- https://chem.libretexts.org/Courses/Prince_Georges_Community_College/CHEM_2000%3A_Chemistry_for_Engineers_(Sinex)/Unit_3%3A_States_of_Matter/Chapter_8%3A_Solids/Chapter_8._10%3A_End_of_Chapter_MaterialIf you wanted to increase the efficiency of an LED display, and thereby the intensity of the emitted light, would you increase or decrease the operating temperature of the LED? Would you expect the me...If you wanted to increase the efficiency of an LED display, and thereby the intensity of the emitted light, would you increase or decrease the operating temperature of the LED? Would you expect the melting point of a glass to be higher or lower than that of pure SiO 2 ? Lead glass, a particular favorite of the Romans, was formed by adding lead oxide as the modifier.
- https://chem.libretexts.org/Courses/Prince_Georges_Community_College/CHEM_2000%3A_Chemistry_for_Engineers_(Sinex)/Unit_3%3A_States_of_Matter/Chapter_8%3A_Solids/Chapter_12.09%3A_Modern_Materialshave at least two distinct components: the matrix (which constitutes the bulk of the material) and fibers or granules that are embedded within the matrix and limit the growth of cracks by pinning defe...have at least two distinct components: the matrix (which constitutes the bulk of the material) and fibers or granules that are embedded within the matrix and limit the growth of cracks by pinning defects in the bulk material (Figure 8.9.3).
- https://chem.libretexts.org/Courses/Prince_Georges_Community_College/CHEM_2000%3A_Chemistry_for_Engineers_(Sinex)/Unit_6%3A_Thermo_and_Electrochemistry/Chapter_15%3A_First_Law_Thermochem/Chapter_15.3%3A_Enthalpy_and_ReactionsFigure 15.3.2 The Enthalpy of Reaction Energy changes in chemical reactions are usually measured as changes in enthalpy. (a) If heat flows from a system to its surroundings, the enthalpy of the system...Figure 15.3.2 The Enthalpy of Reaction Energy changes in chemical reactions are usually measured as changes in enthalpy. (a) If heat flows from a system to its surroundings, the enthalpy of the system decreases, ΔH rxn is negative, and the reaction is exothermic; it is energetically downhill. (b) Conversely, if heat flows from the surroundings to a system, the enthalpy of the system increases, ΔH rxn is positive, and the reaction is endothermic; it is energetically uphill.
- https://chem.libretexts.org/Courses/University_of_Connecticut/Chem_2444%3A_(Second_Semester_Organic_Chemistry)_UConnThis textbook was compiled by Dr. Kiet Tran.
- https://chem.libretexts.org/Courses/Prince_Georges_Community_College/CHEM_2000%3A_Chemistry_for_Engineers_(Sinex)/Unit_4%3A_Nomenclature_and_Reactions/Chapter_12%3A_Aqueous_Reactions/Chapter_12.7%3A__Oxidation-Reduction_ReactionsYou should be generally familiar with which kinds of metals are active metals, the metals at the top of the activity series, which have the greatest tendency to be oxidized. (located at the top of the...You should be generally familiar with which kinds of metals are active metals, the metals at the top of the activity series, which have the greatest tendency to be oxidized. (located at the top of the series) and which are inert metals, the metals at the bottom of the activity series, which have the least tendency to be oxidized. (at the bottom of the series).
- https://chem.libretexts.org/Courses/Prince_Georges_Community_College/CHEM_2000%3A_Chemistry_for_Engineers_(Sinex)/Unit_7%3A_Nuclear_Chemistry/Chapter_18%3A_Nuclear_Chemistry/Chapter_18.0%3A_IntroductionYou will learn how radioactive emissions can be used to study the mechanisms of chemical reactions and biological processes and how to calculate the amount of energy released during a nuclear reaction...You will learn how radioactive emissions can be used to study the mechanisms of chemical reactions and biological processes and how to calculate the amount of energy released during a nuclear reaction. Last, we explore the nuclear chemistry that takes place in stars, and we describe the role that stars play in producing most of the elements in the universe.
- https://chem.libretexts.org/Courses/University_of_Pittsburgh_at_Bradford/CHEM_0089_-_Concepts_of_Chemistry
- https://chem.libretexts.org/Courses/DePaul_University/Physical_Chemistry_for_Biological_Sciences
- https://chem.libretexts.org/Courses/University_of_California_Davis/Chem_124A%3A_Fundamentals_of_Inorganic_Chemistry/07%3A_Solids/7.02%3A_Solids/7.2.07%3A_SuperconductorsFigure 8.7.3 The Relationship of the Structure of a Superconductor Consisting of Y-Ba-Cu-O to a Simple Perovskite Structure (a) Stacking three unit cells of the Ca-centered CaTiO 3 perovskite structur...Figure 8.7.3 The Relationship of the Structure of a Superconductor Consisting of Y-Ba-Cu-O to a Simple Perovskite Structure (a) Stacking three unit cells of the Ca-centered CaTiO 3 perovskite structure (part (b) in Figure 8.3.4 ) together with (b) replacement of all Ti atoms by Cu, replacement of Ca in the top and bottom cubes by Ba, and replacement of Ca in the central cube by Y gives a YBa 2 Cu 3 O 9 stoichiometry. (c) The removal of two oxygen atoms per unit cell gives the nominal YBa 2 Cu 3…
- https://chem.libretexts.org/Courses/Bennington_College/Chemistry_-_An_Integrated_Approach_(Bullock)/Chapter_1%3A_A_Beginner's_Guide_to_Chemicals/1.4%3A_Alkanes_-_The_Chemical_World's_Plain_PastaYou will notice that the esp maps do not show the underlying molecular structure clearly at all; their shapes follow the contours of the “outer edges” of the molecules as we mentioned earlier when dis...You will notice that the esp maps do not show the underlying molecular structure clearly at all; their shapes follow the contours of the “outer edges” of the molecules as we mentioned earlier when discussing what molecules of linoleic acid "look like". To relate the shapes of the esp maps and the corresponding ball and stick models of the same molecules, Figure 1-13 also has superimpositions of a semi-transparent esp map on the ball and stick models (center row).
