Search results for "second-year undergraduate"

showing 3 items of 3 documents

Realistic Implementation of the Particle Model for the Visualization of Nanoparticle Precipitation and Growth

2019

An application for visualizing the aggregation of structureless atoms is presented. The application allows us to demonstrate on a qualitative basis, as well as by quantitatively monitoring the aggregate surface/volume ratio, that the enhanced reactivity of nanoparticles can be connected with their large specific surface. It is suggested that, along with the use of geometric analogies, this bottom-up approach can be effective in discussing the enhanced reactivity proprieties of nanoparticles. The application is based on a two-dimensional realistic dynamic model where atoms move because of their thermal and interaction potential energies, and the trajectories are determined by solving numeric…

Computer-Based Learning01 natural sciencesPhysical ChemistryEducationMolecular dynamicsChemoinformaticHigh School/Introductory ChemistryNanotechnologySet (psychology)First-Year Undergraduate/GeneralSettore CHIM/02 - Chimica FisicaBasis (linear algebra)010405 organic chemistry05 social sciencesAggregate (data warehouse)Process (computing)050301 educationHigh School/Introductory Chemistry First-Year Undergraduate/General Second-Year Undergraduate Physical Chemistry Chemoinformatics Computer-Based Learning NanotechnologyGeneral Chemistry0104 chemical sciencesVisualizationSurface-area-to-volume ratioSecond-Year UndergraduateA priori and a posterioriBiological system0503 education
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PRACTICAL ASPECTS OF THE ANALYSIS OF THE PROGRESSION CURVES OF FIRST AND PSEUDO-FIRST ORDER REACTIONS

2020

The paper presents a simple method of determining iteratively the progression curve asymptote for first and pseudo-first order reactions. For selected student exercises, thus obtained results were compared (see Supplementary Material) with those found by means of the method of determining asymptotes experimentally. A nonlinear fitting method was additionally employed to assess the accuracy.

General Chemistrychemoinformaticsmechanisms of reactionsNonlinear systemChemistrySimple (abstract algebra)kineticsPseudo first orderphysical chemistryApplied mathematicssecond-year undergraduateAsymptoteQD1-999Mathematics
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A Simple Method for the Consecutive Determination of Protonation Constants through Evaluation of Formation Curves

2013

A simple method is presented for the consecutive determination of protonation constants of polyprotic acids based on their formation curves. The procedure is based on generally known equations that describe dissociation equilibria. It has been demonstrated through simulation that the values obtained through the proposed method are sufficiently consistent with the actual values. In contrast with the universally known and applied Bjerrum’s method, no differences in the accuracy of determination of subsequent protonation constant values are observed. The proposed method requires the value of one of the protonation constants (e.g., of the first one, K1) of the polyprotic acid. An iterative meth…

Science instructionpHChemistryIterative methodAcids/BasesNumerical analysisComputationThermodynamicsProtonationGeneral ChemistryequilibriumDissociation (chemistry)EducationNonlinear approximationanalytical chemistryphysical chemistryProtonation constantsecond-year undergraduatecomputer-based learningJournal of Chemical Education
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