Physical chemistry
... E. U = 2H 19. When thermodynamics process has V = const . It is named: A. *Isochoric B. Isothermic C. Adiabatic D. Isobaric E. There is not right answer 20. It consists of a definite amount of one or more substances and is separated from the surroundings by a real or imaginary boundary through which ...
... E. U = 2H 19. When thermodynamics process has V = const . It is named: A. *Isochoric B. Isothermic C. Adiabatic D. Isobaric E. There is not right answer 20. It consists of a definite amount of one or more substances and is separated from the surroundings by a real or imaginary boundary through which ...
Topic 3: Periodicity
... They attract species that are rich in electrons: ligands. A ligand has at least one atom with a lone pair of electrons, e.g. H2O, NH3, Cl-, CN- ...
... They attract species that are rich in electrons: ligands. A ligand has at least one atom with a lone pair of electrons, e.g. H2O, NH3, Cl-, CN- ...
5 Thermochemistry
... surroundings will increase. The system loses heat by decreasing its temperature, so the sign of q is (–). The process is exothermic. ...
... surroundings will increase. The system loses heat by decreasing its temperature, so the sign of q is (–). The process is exothermic. ...
Answer
... Between experiments 1 and 2, [H2] is kept constant. Doubling [NO] (from 5.0 × 10-3 to 1.0 × 10-2 M) leads to the rate quadrupling. The reaction is second order with respect to [NO]. Between experiments 2 and 3, [NO] is kept constant. Doubling [H2] (from 2.0 × 10-3 to 4.0 × 10-3 M) leads to the rate ...
... Between experiments 1 and 2, [H2] is kept constant. Doubling [NO] (from 5.0 × 10-3 to 1.0 × 10-2 M) leads to the rate quadrupling. The reaction is second order with respect to [NO]. Between experiments 2 and 3, [NO] is kept constant. Doubling [H2] (from 2.0 × 10-3 to 4.0 × 10-3 M) leads to the rate ...
Calometric Measurement of Saponification Reaction
... The term saponification is commonly used to describe the chemical process that results in the formation of soap. Saponification in this context involves the hydrolysis of an ester, under basic conditions, to form an alcohol and a carboxylate salt. When aqueous sodium hydroxide, caustic soda, is adde ...
... The term saponification is commonly used to describe the chemical process that results in the formation of soap. Saponification in this context involves the hydrolysis of an ester, under basic conditions, to form an alcohol and a carboxylate salt. When aqueous sodium hydroxide, caustic soda, is adde ...
KUT 101/2 – General Chemistry Practical I
... • Differentiate the primary and secondary standards. • Differentiate the equivalence and end-points. • Choose suitable indicators for acid-base titration. • Determine the amount of acid in an unknown. • Know a quantitative technique of volumetric analysis. • Understand the definition of BOD (Biochem ...
... • Differentiate the primary and secondary standards. • Differentiate the equivalence and end-points. • Choose suitable indicators for acid-base titration. • Determine the amount of acid in an unknown. • Know a quantitative technique of volumetric analysis. • Understand the definition of BOD (Biochem ...
Writing And Balancing Equations
... On the left, Zn and HCl are reactants On the right, ZnCl2 and H2 are products The arrow () means “yields” The up arrow () indicated a gas product The 2 in front of HCl is a coefficient The small 2 to the right of H is a subscript ...
... On the left, Zn and HCl are reactants On the right, ZnCl2 and H2 are products The arrow () means “yields” The up arrow () indicated a gas product The 2 in front of HCl is a coefficient The small 2 to the right of H is a subscript ...
Chapter 19: Thermochemistry II: Entropy and free Energy
... One way to think about this in terms of probability. There are a huge number of ways that the total energy can be distributed into the random motions of the water molecules + diver (FRAME 1). There are a small number of ways to concentrate this same amount of energy in the diver on the board. T ...
... One way to think about this in terms of probability. There are a huge number of ways that the total energy can be distributed into the random motions of the water molecules + diver (FRAME 1). There are a small number of ways to concentrate this same amount of energy in the diver on the board. T ...
2A6
... vibrational excitation of the S-S stretching mode by injecting tunneling electrons (> 0.36 eV) from the STM tip. The STM images of dissociated molecules after light irradiation have the same appearance as CH3S molecules obtained by injecting tunneling electrons into a (CH3S)2 molecule. This indicate ...
... vibrational excitation of the S-S stretching mode by injecting tunneling electrons (> 0.36 eV) from the STM tip. The STM images of dissociated molecules after light irradiation have the same appearance as CH3S molecules obtained by injecting tunneling electrons into a (CH3S)2 molecule. This indicate ...
Questions for Study
... What is the kinetic energy of an oxygen molecule traveling at a speed of 479 m/s in a tank at 21°C? (Hint: Use Avogadro’s number and the molar mass of O2 to get the actual mass of an ...
... What is the kinetic energy of an oxygen molecule traveling at a speed of 479 m/s in a tank at 21°C? (Hint: Use Avogadro’s number and the molar mass of O2 to get the actual mass of an ...
Review redox reactions
... It is also called the cell potential (Ecell). Cell potential is measured in volts (V) and it is often called the cell voltage. ...
... It is also called the cell potential (Ecell). Cell potential is measured in volts (V) and it is often called the cell voltage. ...
Chemical Energy
... The energy released in a chemical reaction raises the internal energy, E, and does work under constant pressure at the expense of energy stored in compounds. Thus, ...
... The energy released in a chemical reaction raises the internal energy, E, and does work under constant pressure at the expense of energy stored in compounds. Thus, ...
Document
... Format for naming chemical compounds using prefixes, suffixes, and other modifications of the names of elements ...
... Format for naming chemical compounds using prefixes, suffixes, and other modifications of the names of elements ...
Lab 1-1 - My eCoach
... the changes matter undergoes. The changes you can observe are called “macroscopic changes.” Often these changes, such as color changes, the formation of a solid (precipitation), or the formation of gas bubbles (effervescence), are visible. Thus, though we cannot see the atoms and molecules reacting, ...
... the changes matter undergoes. The changes you can observe are called “macroscopic changes.” Often these changes, such as color changes, the formation of a solid (precipitation), or the formation of gas bubbles (effervescence), are visible. Thus, though we cannot see the atoms and molecules reacting, ...
Transition state theory
Transition state theory (TST) explains the reaction rates of elementary chemical reactions. The theory assumes a special type of chemical equilibrium (quasi-equilibrium) between reactants and activated transition state complexes.TST is used primarily to understand qualitatively how chemical reactions take place. TST has been less successful in its original goal of calculating absolute reaction rate constants because the calculation of absolute reaction rates requires precise knowledge of potential energy surfaces, but it has been successful in calculating the standard enthalpy of activation (Δ‡Hɵ), the standard entropy of activation (Δ‡Sɵ), and the standard Gibbs energy of activation (Δ‡Gɵ) for a particular reaction if its rate constant has been experimentally determined. (The ‡ notation refers to the value of interest at the transition state.)This theory was developed simultaneously in 1935 by Henry Eyring, then at Princeton University, and by Meredith Gwynne Evans and Michael Polanyi of the University of Manchester. TST is also referred to as ""activated-complex theory,"" ""absolute-rate theory,"" and ""theory of absolute reaction rates.""Before the development of TST, the Arrhenius rate law was widely used to determine energies for the reaction barrier. The Arrhenius equation derives from empirical observations and ignores any mechanistic considerations, such as whether one or more reactive intermediates are involved in the conversion of a reactant to a product. Therefore, further development was necessary to understand the two parameters associated with this law, the pre-exponential factor (A) and the activation energy (Ea). TST, which led to the Eyring equation, successfully addresses these two issues; however, 46 years elapsed between the publication of the Arrhenius rate law, in 1889, and the Eyring equation derived from TST, in 1935. During that period, many scientists and researchers contributed significantly to the development of the theory.