🎯 Key points for quick navigation: 00:00 *📚 Vinício Oliveira announces the release of exclusive thermochemistry classes on UA-cam for free, aiming to boost final exam preparation.* 00:29 *🎯 Topics covered include concepts like enthalpy, exothermic, and endothermic reactions, important for ENEM exams.* 01:09 *📅 Students preparing for future ENEM or entrance exams can join the platform's waitlist; details in the description.* 01:38 *🔬 Begins exploration of thermochemistry with an experiment to determine the calorific value of food.* 02:21 *🥘 Explanation of a simple experiment involving combustion to measure the calories in food.* 03:28 *🔥 Combustion is key as it's an exothermic reaction, releasing heat absorbed by water to measure temperature change.* 04:24 *📏 By measuring temperature change, mass, and specific heat of water, calorie content of food is determined.* 05:20 *⚗️ Distinction between exothermic and endothermic reactions is crucial in thermochemistry.* 06:01 *🔄 Endothermic reactions absorb heat, with a positive enthalpy change (ΔH > 0).* 07:10 *🔄 Enthalpy (H) helps measure energy of reactants and products; focus is on the change in enthalpy (ΔH).* 08:05 *🌡️ Energy change calculations use enthalpy of products minus reactants; outcome determines reaction type.* 09:02 *🔍 Three ways to depict endothermic reactions: ΔH positive, reactants + heat, or products - heat.* 11:29 *📈 Graphically, endothermic reactions show an increase in enthalpy as reactants gain energy.* 13:22 *⏫ Energy of activation is needed to reach the highest energy point, forming the activated complex.* 14:47 *📉 Formation of products results in decreased enthalpy; positive enthalpy change signifies an endothermic process.* 16:36 *↔️ Exothermic reactions release heat, opposite to endothermic, and are characterized by a negative ΔH.* 17:33 *🔥 Combustion reactions are exothermic, releasing heat into the environment, indicated by a negative enthalpy change.* 18:00 *➖ Enthalpy change is always calculated as the enthalpy of products minus the enthalpy of reactants.* 18:29 *📝 Exothermic reactions can be represented in three forms, including showing heat as a product.* 20:01 *🔄 Energy balance is crucial when depicting exothermic reactions to avoid misinterpretation.* 21:10 *📉 In a reaction energy graph, reactants start with higher enthalpy than products, signaling an exothermic reaction.* 22:06 *🔋 Activation energy is required for reactants to reach the activated complex, shown by the peak in the reaction graph.* 22:45 *📉 A decrease in enthalpy from reactants to products results in a negative enthalpy change, fundamental to exothermic reactions.* 24:05 *🏆 The scientist Richard Feynman's observations highlight the need for activation energy for combustion to occur naturally.* 28:02 *💡 Combustion reactions in cars require an initial energy input, like a spark, to overcome activation energy.* 31:41 *🚗 The correct energy graph for combustion shows reactants with high energy converting to lower-energy products after receiving activation energy.* 35:02 *🔍 The enthalpy change (\(\Delta H\)) for the reaction discussed is less than zero, indicating an exothermic process where products have lower energy than reactants.* 36:24 *🧬 Enzymes facilitate reactions by lowering activation energy, demonstrated using two curves, one with and one without the enzyme.* 38:12 *📉 The energy of the activated complex for curve two is confirmed at 50 kcal/mol.* 39:23 *❌ Reactions labeled as "endothermic" cannot have \(\Delta H\) less than zero; contradictions arise when \(\Delta H\) given as negative for an endothermic reaction.* 42:48 *⚖️ Curves demonstrate how enzymes decrease reaction's activation energy, with curve one illustrating no enzyme and curve two showing enzyme presence.* 44:10 *⚗️ Methods to determine enthalpy variations include formation enthalpy, bond enthalpy, and Hess's Law, which are crucial for understanding reaction energetics.* 50:06 *🧪 Example problem with titanium dioxide production showcases applying enthalpy variation calculation principles using given formation enthalpies.* 52:28 *🔄 Confirming reactions are balanced is essential as it affects enthalpy calculations, highlighted through an example with specific reactants and products.* 02:05:34 *🔄 Transition from liquid to gas increases entropy, generally.* 02:06:00 *📈 Entropy change is positive when reactants are liquid and products are gas.* 02:06:44 *📊 Gibbs free energy equation considers both enthalpy and entropy for spontaneity.* 02:07:37 *🔍 Reaction spontaneity varies with enthalpy and entropy change values.* 02:08:32 *🚫 Endothermic reactions are not always spontaneous; false generalization.* 02:09:14 *✅ Exothermic reactions are always spontaneous due to negative Gibbs free energy change.* Made with HARPA AI
macete p/ decorar a entalpia de ligação: formEX (formação de ligação é EXO) e quebrENDO (quebra de ligação é ENDO) pode ser que te ajude no dia da prova. Boa Sorte!
Vini, não tem nada a haver com a live mas eu tenho uma dúvida em relação aos estudos, você falou em um vídeo antigo que deixava a noite para ver séries, videos de estudos e tals Você acha que ouvir música atrapalha no rendimento? Geralmente elas são em inglês...
Depende muito, se atrapalhar para escutar o professor do vídeo, atrapalha, se tu consegue se concentrar, e entender a matéria, por que não fazer isso? Eu particularmente não consigo, mas para fazer exercícios é mt bom para mim ficar escutando fraga?
Bora engajar pra sair de probabilidade galera ✈️
boraaa!!!
Vamos
vini, faz um video com tudo de geometria para o enem
Up
Oii Boa tarde professor 👍
Up
POR FAVOR!!!
Up
Cara, disponibiliza aquela aulona FODA de análise combinatória pra coroar a tropa do alto desempenho!🫡 POR FAVOR🙏🏻
Vinii, faz uma aula assim de log e funcao trigonométrica, por favoor
Mais matemática Vini, por favor
pra função trigonométrica eu recomendo a aula que professor fredão fez esses dias, muito boa!!
🎯 Key points for quick navigation:
00:00 *📚 Vinício Oliveira announces the release of exclusive thermochemistry classes on UA-cam for free, aiming to boost final exam preparation.*
00:29 *🎯 Topics covered include concepts like enthalpy, exothermic, and endothermic reactions, important for ENEM exams.*
01:09 *📅 Students preparing for future ENEM or entrance exams can join the platform's waitlist; details in the description.*
01:38 *🔬 Begins exploration of thermochemistry with an experiment to determine the calorific value of food.*
02:21 *🥘 Explanation of a simple experiment involving combustion to measure the calories in food.*
03:28 *🔥 Combustion is key as it's an exothermic reaction, releasing heat absorbed by water to measure temperature change.*
04:24 *📏 By measuring temperature change, mass, and specific heat of water, calorie content of food is determined.*
05:20 *⚗️ Distinction between exothermic and endothermic reactions is crucial in thermochemistry.*
06:01 *🔄 Endothermic reactions absorb heat, with a positive enthalpy change (ΔH > 0).*
07:10 *🔄 Enthalpy (H) helps measure energy of reactants and products; focus is on the change in enthalpy (ΔH).*
08:05 *🌡️ Energy change calculations use enthalpy of products minus reactants; outcome determines reaction type.*
09:02 *🔍 Three ways to depict endothermic reactions: ΔH positive, reactants + heat, or products - heat.*
11:29 *📈 Graphically, endothermic reactions show an increase in enthalpy as reactants gain energy.*
13:22 *⏫ Energy of activation is needed to reach the highest energy point, forming the activated complex.*
14:47 *📉 Formation of products results in decreased enthalpy; positive enthalpy change signifies an endothermic process.*
16:36 *↔️ Exothermic reactions release heat, opposite to endothermic, and are characterized by a negative ΔH.*
17:33 *🔥 Combustion reactions are exothermic, releasing heat into the environment, indicated by a negative enthalpy change.*
18:00 *➖ Enthalpy change is always calculated as the enthalpy of products minus the enthalpy of reactants.*
18:29 *📝 Exothermic reactions can be represented in three forms, including showing heat as a product.*
20:01 *🔄 Energy balance is crucial when depicting exothermic reactions to avoid misinterpretation.*
21:10 *📉 In a reaction energy graph, reactants start with higher enthalpy than products, signaling an exothermic reaction.*
22:06 *🔋 Activation energy is required for reactants to reach the activated complex, shown by the peak in the reaction graph.*
22:45 *📉 A decrease in enthalpy from reactants to products results in a negative enthalpy change, fundamental to exothermic reactions.*
24:05 *🏆 The scientist Richard Feynman's observations highlight the need for activation energy for combustion to occur naturally.*
28:02 *💡 Combustion reactions in cars require an initial energy input, like a spark, to overcome activation energy.*
31:41 *🚗 The correct energy graph for combustion shows reactants with high energy converting to lower-energy products after receiving activation energy.*
35:02 *🔍 The enthalpy change (\(\Delta H\)) for the reaction discussed is less than zero, indicating an exothermic process where products have lower energy than reactants.*
36:24 *🧬 Enzymes facilitate reactions by lowering activation energy, demonstrated using two curves, one with and one without the enzyme.*
38:12 *📉 The energy of the activated complex for curve two is confirmed at 50 kcal/mol.*
39:23 *❌ Reactions labeled as "endothermic" cannot have \(\Delta H\) less than zero; contradictions arise when \(\Delta H\) given as negative for an endothermic reaction.*
42:48 *⚖️ Curves demonstrate how enzymes decrease reaction's activation energy, with curve one illustrating no enzyme and curve two showing enzyme presence.*
44:10 *⚗️ Methods to determine enthalpy variations include formation enthalpy, bond enthalpy, and Hess's Law, which are crucial for understanding reaction energetics.*
50:06 *🧪 Example problem with titanium dioxide production showcases applying enthalpy variation calculation principles using given formation enthalpies.*
52:28 *🔄 Confirming reactions are balanced is essential as it affects enthalpy calculations, highlighted through an example with specific reactants and products.*
02:05:34 *🔄 Transition from liquid to gas increases entropy, generally.*
02:06:00 *📈 Entropy change is positive when reactants are liquid and products are gas.*
02:06:44 *📊 Gibbs free energy equation considers both enthalpy and entropy for spontaneity.*
02:07:37 *🔍 Reaction spontaneity varies with enthalpy and entropy change values.*
02:08:32 *🚫 Endothermic reactions are not always spontaneous; false generalization.*
02:09:14 *✅ Exothermic reactions are always spontaneous due to negative Gibbs free energy change.*
Made with HARPA AI
Vini, se puder, faz um vídeo mostrando e explicando por cima todas as fórmulas de matemática/física!
Vini, traz todos os simulados do SAS, Somos, Bernoulli e por aí vai depois desse projeto de trazer todas provas do enem.
Petição p Vini virar presidente do Ministério da Educação 🙌🙌
macete p/ decorar a entalpia de ligação: formEX (formação de ligação é EXO) e quebrENDO (quebra de ligação é ENDO) pode ser que te ajude no dia da prova. Boa Sorte!
Acabei de chegar ,que fique salva amém 🙏🏻
Faz resolvendo questões de log. Dificuldade de muitos 🥲
Simboraaaa
vini, eu quero que vc seja muito feliz em toda a sua vida. vc eh sensacional. obrigada por tanto
O melhor do cenário de enem, ntj!
Obrigado por tudo, Vini
Valeuu!! Marcando presença aqui!
Ansiosa por essa aula!
Vinícius, faz um vídeo sobre Química Orgânica.
Vini faz uma live sobre assuntos mais recorrentes em biologia
Vamo cuidar, amem
ayeeeouuu vamos nessa!!
Obrigadaaaa prof!!! Falta pouquinho pra chegar em mil likes! Vou mandar no grupo da família pra eles darem o like e vou pegar o Tablet também ❤
braboooo!!!! valeu pela aula, vini
Demais! Obrigado pelo conteúdo.
Vini, faz uma de biologia (genética, biotecnologia)
Muito boa essa aula!!!
Vou botar pra quebrar nesse segundo dia , espero ir bem principalmente em naturezas que eu acho mais difícil
Genteee comenta pra ficar salvo
Obrigada, Vini!
Divoooo
faz um video de doenças que caem no enem
mais que um prefeito, um pai…
vini é um pai
Maioral 💪🏽
Excelente aula!
Lança uma aula de geometria analítica 😢 n consigo entender
Eu quero a aula de PROBABILIDADEEE
amoo
isso não é um professor, é um prefeito
já assisti, pode apagar.
aula muito boa, Vinão! Muito obrigado, que possa servir a muitos outros!
kkkkkkkkkkkkkkkkkkkk
Vini, não tem nada a haver com a live mas eu tenho uma dúvida em relação aos estudos, você falou em um vídeo antigo que deixava a noite para ver séries, videos de estudos e tals
Você acha que ouvir música atrapalha no rendimento? Geralmente elas são em inglês...
Depende muito, se atrapalhar para escutar o professor do vídeo, atrapalha, se tu consegue se concentrar, e entender a matéria, por que não fazer isso?
Eu particularmente não consigo, mas para fazer exercícios é mt bom para mim ficar escutando fraga?
🔥
❤❤❤❤
🚀
👏🏻👏🏻👏🏻
Boa
Oi queria que vc resolvesse 2023
As provas? Se for, já tem no canal resolvidas
Maioral🦾
Oi
homem tu deletou teu insta?
Não
é privado
Odeio termoquimica
Estudo, estudo e não entendo isso. Acho melhor aceitar que vou vender arte na praia