November 2016 (v1) QP - Paper 4 CIE Chemistry A-level
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... from ............................................................ to ............................................................ [1] ...
Intro to Titrimetry
... concentration which is accurately delivered using a buret Analyte – solution of unknown concentration which reacts with the titrant Indicators – compounds which do not participate in the general reaction between analyte and titrant, but are indirectly affected by the reaction producing notable chang ...
... concentration which is accurately delivered using a buret Analyte – solution of unknown concentration which reacts with the titrant Indicators – compounds which do not participate in the general reaction between analyte and titrant, but are indirectly affected by the reaction producing notable chang ...
Combustion thermodynamics
... Second Law: there exists a state-function named entropy, S(E,V,ni), measuring the distribution of thermal energy within the system, such that for any process in a control-mass system, its variation is lower-bounded to ∆S≥∫dQ/T, with the equality holding only for the limit case of a nondissipating pr ...
... Second Law: there exists a state-function named entropy, S(E,V,ni), measuring the distribution of thermal energy within the system, such that for any process in a control-mass system, its variation is lower-bounded to ∆S≥∫dQ/T, with the equality holding only for the limit case of a nondissipating pr ...
Regents Chemistry Topic Review Packet
... 4. A physical change results in the rearrangement of existing particles in a substance; no new types of particles result from this type of change. A chemical change results in the formation of different particles with changed properties. Distinguish between chemical and physical changes based on w ...
... 4. A physical change results in the rearrangement of existing particles in a substance; no new types of particles result from this type of change. A chemical change results in the formation of different particles with changed properties. Distinguish between chemical and physical changes based on w ...
Specific Heat and Enthalpy Practice
... 3. If a 3.15 g ring is heated using 10.0 J, it’s temperature rises by 17.9C. Calculate the specific heat capacity of the ring. Is the ring pure gold? ANS: 0.177 J/g-ºC, No 4. Exothermic or Endothermic Reaction a. KBrO3(s) + 42 kJ KBrO3(aq) ANS: Endo b. 2 Mg(s) + O2(g) 2 MgO(s) + 1200 kJ ANS: Ex ...
... 3. If a 3.15 g ring is heated using 10.0 J, it’s temperature rises by 17.9C. Calculate the specific heat capacity of the ring. Is the ring pure gold? ANS: 0.177 J/g-ºC, No 4. Exothermic or Endothermic Reaction a. KBrO3(s) + 42 kJ KBrO3(aq) ANS: Endo b. 2 Mg(s) + O2(g) 2 MgO(s) + 1200 kJ ANS: Ex ...
Exam No. 1
... 32- Consider the following reactions (equations are not balanced): 1- NH3 + O2 → N2 + H2O 2- HNO3 + S → NO + SO2 + H2O Nitrogen is acting as: (a) Oxidizing agent in both equations. (b) Reducing agent in both equations. **(c) Reducing agent in eq.(1) and oxidizing agent in eq.(2). (d) Reducing agent ...
... 32- Consider the following reactions (equations are not balanced): 1- NH3 + O2 → N2 + H2O 2- HNO3 + S → NO + SO2 + H2O Nitrogen is acting as: (a) Oxidizing agent in both equations. (b) Reducing agent in both equations. **(c) Reducing agent in eq.(1) and oxidizing agent in eq.(2). (d) Reducing agent ...
On the Evolution of Chemical Organizations
... can be classified roughly into replicator centered and network centered approaches. The first approach assumes replicating molecules as the central unit of chemical evolution. Models like the Quasispecies [7] or in-silico RNA evolution [10] have characterized the capacity of chemical systems to stor ...
... can be classified roughly into replicator centered and network centered approaches. The first approach assumes replicating molecules as the central unit of chemical evolution. Models like the Quasispecies [7] or in-silico RNA evolution [10] have characterized the capacity of chemical systems to stor ...
NATIONAL HIGH SCHOOL CHEMISTRY EXAMINATION (1995
... 14. Solid CO2 is called "dry ice", because it changes directly from a solid to a gas at –78°C without ever becoming liquid (at 1 atm pressure). When solid CO2 becomes a gas: A. Its energy decreases and its entropy decreases B. Its energy is constant and its entropy increases C. Its energy decreases ...
... 14. Solid CO2 is called "dry ice", because it changes directly from a solid to a gas at –78°C without ever becoming liquid (at 1 atm pressure). When solid CO2 becomes a gas: A. Its energy decreases and its entropy decreases B. Its energy is constant and its entropy increases C. Its energy decreases ...
Practice problems
... K is indeed very large! This means that we expect silver metal to oxidize in acidic environments, in air, to Ag +. Notice that the voltage calculated for the reaction was 0.43 V, which is easy to measure. Directly measuring such a large equilibrium constant by measuring reactant and product concentr ...
... K is indeed very large! This means that we expect silver metal to oxidize in acidic environments, in air, to Ag +. Notice that the voltage calculated for the reaction was 0.43 V, which is easy to measure. Directly measuring such a large equilibrium constant by measuring reactant and product concentr ...
Detailed TOC
... Types of Chemical Formulas Molecular Models 3.4 An Atomic-Level Perspective of Elements and Compounds 3.5 Ionic Compounds: Formulas and Names Writing Formulas for Ionic Compounds Naming Ionic Compounds Naming Binary Ionic Compounds Naming Binary Ionic Compounds Containing a Metal that Forms More tha ...
... Types of Chemical Formulas Molecular Models 3.4 An Atomic-Level Perspective of Elements and Compounds 3.5 Ionic Compounds: Formulas and Names Writing Formulas for Ionic Compounds Naming Ionic Compounds Naming Binary Ionic Compounds Naming Binary Ionic Compounds Containing a Metal that Forms More tha ...
malhotra book depot
... We are committed to serve students with best of our knowledge and resources. We have taken utmost care and attention while editing and printing this book but we would beg to state that Authors and Publishers should not be held responsible for unintentional mistakes that might have crept in. However, ...
... We are committed to serve students with best of our knowledge and resources. We have taken utmost care and attention while editing and printing this book but we would beg to state that Authors and Publishers should not be held responsible for unintentional mistakes that might have crept in. However, ...
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.