UNICAMP Chemistry Exam Correction 2023. Resolution of the UNICAMP Chemistry Exam 2023, first phase. The first phase of the Unicamp 2023 exam had 72 questions, six of which were multiple-choice chemistry questions. According to the corrections of the prep courses, the exam was up-to-date and without easy math questions. In addition, a possible Portuguese question on the Unicamp 2023 exam has no answer and should be canceled. The announcement of those approved for the second phase of the Unicamp 2023 entrance exam will be released on 12/03/2023, with the second phase exams taking place on December 11th and 12th. Other dates for the 2023 Unicamp entrance exam Specific Skills Tests: 01/04 to 01/06/2023 First call announcement: 02/06/2023 First call online registration: 02/07, 02/08 and 02/09/2023 08:25 Question 14 (Unicamp 2023, First Phase, QZ Test) One of the principles of Green Chemistry, illustrated by one of the groups at TPQVS (text I), is atomic economy, given by the ratio of the mass of the product of interest to the total mass of the reactants, and the closer its value is to 1, the greater the atomic economy. 18:45 Question 15 (Unicamp 2023, First Phase, Exam QZ) Considering the Green Chemistry proposal, the bold phrases in the poem (text II) can, in free interpretation, be associated, respectively, with the following TPQVS groups: 25:23 Question 16 (Unicamp 2023, First Phase, Exam QZ) In order to mitigate environmental problems and find viable alternatives for fuel production, many proposals have been suggested. The figures below show transformation routes that would make it possible to achieve the aforementioned objective. 37:45 Question 17 (Unicamp 2023, First Phase, Exam QZ) Electronic cigarettes, in general, contain a capsule with a liquid solution of nicotine and flavorings that are vaporized and later inhaled by the user. Although advertisements claim that the concentration of toxic substances in e-cigarettes is lower, the main substance that causes addiction, nicotine, is present in most of these products. Nicotine is initially absorbed and then metabolized in the body. After a period of time, the decrease in its concentration in the blood plasma causes the user to feel the need to inhale a new dose. The graph below shows the concentration of nicotine in the blood plasma of three individuals, as a function of time, after using an e-cigarette, inhaling the same dose of the substance. 50:42 Question 18 (Unicamp 2023, First Phase, Exam QZ) Whitewashing or painting with hydrated lime (Ca(OH)2) is one of the oldest ways to coat the facade of buildings. Quicklime (CaO) – produced by heating limestone (CaCO3) –, when placed in water, forms hydrated lime which, once applied to the wall and in contact with CO2 in the atmospheric air, transforms into its precursor, calcium carbonate. In this way, the calcium carbonate adheres to the wall, protecting, preserving and beautifying it. 1:08 Question 19 (Unicamp 2023, First Phase, QZ Test) In a scientific study published in 2022 in Chemical Science, the authors heated samples of dried banana peel, using, for a short period of time, a high-intensity light bulb. This heating technique is called light pyrolysis. This irradiation promoted the formation of a type of coal and gaseous products. In an experiment, the quantification of the gases produced is found in the figure below. 1:18 Question 20 (Unicamp 2023, First Phase, QZ Exam) The provocative article entitled, in free translation, “Is nitrogen the next carbon?”, published in 2017, emphasizes, right from the beginning, that, just as carbon fueled the industrial revolution, nitrogen would have fueled the revolution in agriculture (the so-called “green revolution”), which would continue to occur today. The following graph shows the growth of reactive anthropogenic nitrogen compared to the growth of CO2 emissions, pointing to a future of potential environmental problems. ???? SUBSCRIBE TO THE CHANNEL - https://bit.ly/3zY1x21 ???? Did you like the video? Leave your LIKE! Follow me on social media: ✏️Instagram: / prof_igor_quimica ✏️Twitter: / igorsuga ✏️Blog: https://igorsuga.wordpress.com/ #chemistry #igorchemistry #entranceexam #unicamp #questionsolving #unicampcorrection #eunaunicamp #entranceexams