Hitrost kemijske reakcije

Podgrajšek, Vesna (author), Cerc Korošec, Romana (mentor)

Hitrost kemijske reakcije nam pove, kako hitro se med reakcijo reaktanti pretvarjajo v produkte. Običajno hitrost ponazorimo s spremembo množinske koncentracije reaktantov oz. produktov v časovni enoti. Na hitrost kemijske reakcije vplivajo kemijske lastnosti reaktantov, njihove koncentracije oziroma tlak, temperatura, pri kateri reakcija poteka, prisotnost katalizatorja in velikost površine trdnega reaktanta. Razumevanje teh dejavnikov je ključno tako v vsakdanjem življenju, na primer pri shranjevanju hrane, kot tudi v industriji, kjer si prizadevajo optimizirati pogoje reakcij za učinkovito proizvodnjo. V magistrski nalogi so predstavljeni trije eksperimenti na temo hitrosti kemijske reakcije, ki so primerni za izvedbo v srednji šoli. Prvi obravnava vpliv koncentracije reaktanta na hitrost kemijske reakcije, drugi vpliv temperature in katalizatorja na hitrost kemijske reakcije in tretji vpliv specifične površine trdnega katalizatorja na hitrost kemijske reakcije. Sestavila sem tudi delovne liste z navodili za učitelja in za dijake.

• Language: Slovenian
• Keywords: hitrost kemijske reakcije, temperatura, katalizator, koncentracija reaktanta, specifična površina
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2024
• PID: 20.500.12556/RUL-155828
• COBISS.SI-ID: 193899523
• Publication date in RUL: 22.04.2024

PODGRAJŠEK, Vesna, 2024, Hitrost kemijske reakcije [online]. Master’s thesis. [Accessed 17 May 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=155828

Secondary language

• Language: English
• Title: The rate of chemical reaction

Abstract

The rate of a chemical reaction tells us how quickly reactants transform into products during the reaction. Typically, we represent the rate by the change in the molar concentration of reactants or products per unit of time. The rate of a chemical reaction is influenced by the chemical properties of reactants, their concentrations or pressure, the temperature at which the reaction takes place, the presence of a catalyst, and the surface area of a solid reactant. Understanding these factors is crucial in everyday life, such as in food preservation, as well as in industry, where efforts are made to optimize reaction conditions for efficient production. In my master's thesis, three experiments on the topic of the speed of chemical reactions, which are suitable for high school implementation, are presented. The first one addressed the influence of the concentration of a reactant on the rate of a chemical reaction, the second one examined the impact of temperature and a catalyst on the rate of a chemical reaction, and the third one explored the effect of the specific surface area of a solid catalyst on the rate of a chemical reaction. The worksheets with instructions for both teachers and students were also created.

• Keywords: rate of a chemical reaction, temperature, catalyst, concentration of reactant, specific surface area