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Private teachers in Amsterdam

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1595 private teachers in Amsterdam

Elias

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C$40

60-min

/h

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Enthalpy Changes in Chemical Reactions; This lesson explores how chemical reactions involve energy changes that can be exo or endothermic.Translate this text using Google Translate.

Enthalpy Changes in Chemical Reactions; This lesson explores how chemical reactions involve energy changes that can be exo or endothermic.Translate this text using Google Translate.

Lesson Plan: Enthalpy Changes in Chemical Reactions Grade/Level: Secondary / IGCSE / AS level Duration: 60 minutes Topic: Enthalpy Changes in Reactions Lesson Objectives By the end of the lesson, students should be able to: 1. Understand that chemical reactions are accompanied by enthalpy changes, which can be exothermic or endothermic. 2. Construct and interpret reaction pathway diagrams, showing enthalpy change and activation energy. 3. Define and use key terms: standard conditions (⦵), enthalpy change of reaction (ΔHr⦵), formation (ΔHf⦵), combustion (ΔHc⦵), and neutralisation (ΔHneut⦵). Lesson Breakdown (60 minutes) 1. Introduction (5 minutes) Begin with a real-life hook: Ask: “Why does burning wood release heat, but dissolving ammonium nitrate in water feels cold?” Link to lesson: These are examples of exothermic and endothermic reactions. 2. Theory: Enthalpy Changes (10 minutes) Define enthalpy (H): The heat content of a system at constant pressure. Define enthalpy change (ΔH): Heat energy transferred during a reaction at constant pressure. Distinguish: Exothermic reaction: ΔH is negative (heat released). Endothermic reaction: ΔH is positive (heat absorbed). Give simple examples: Exothermic → combustion of methane. Endothermic → thermal decomposition of calcium carbonate. 3. Reaction Pathway Diagrams (15 minutes) Draw and explain two diagrams: Exothermic pathway: Products lower in energy than reactants, ΔH negative. Endothermic pathway: Products higher in energy than reactants, ΔH positive. Introduce activation energy (Ea):Minimum energy needed for reaction to occur. Label diagrams clearly: Reactants → peak (activation energy) → products. Highlight ΔH and Ea. 4. Standard Conditions and Key Enthalpy Terms (15 minutes) Explain standard conditions (⦵): 298 K (25°C), 101 kPa pressure, substances in standard states. Define and discuss: Standard enthalpy change of reaction (ΔHr⦵): Heat change when reaction occurs in molar quantities under standard conditions. Standard enthalpy of formation (ΔHf⦵): Heat change when 1 mole of compound is formed from its elements in their standard states. Standard enthalpy of combustion (ΔHc⦵):Heat change when 1 mole of substance is completely burnt in oxygen under standard conditions. Standard enthalpy of neutralisation (ΔHneut⦵): Heat change when an acid and alkali react to form 1 mole of water under standard conditions. Use simple examples for each (e.g., combustion of methane, formation of H2O, neutralisation of HCl with NaOH). 5. Guided Practice / Mini Activity (10 minutes) Students sketch their own reaction pathway diagrams (exothermic and endothermic). Label ΔH and Ea. Pair discussion: “Why do we still need activation energy even for exothermic reactions?” 6. Exercise (Homework / Classwork) (5 minutes) Answer the following questions: 1. State whether each reaction is exothermic or endothermic: a) Burning propane gas in oxygen. b) Photosynthesis in plants. c) Dissolving anhydrous copper(II) sulfate in water. 2. On a reaction pathway diagram: Show ΔH and Ea for an endothermic reaction. 3. Define the following terms and give one example each: a) Standard enthalpy of formation (ΔHf⦵) b) Standard enthalpy of combustion (ΔHc⦵) c) Standard enthalpy of neutralisation (ΔHneut⦵) 4. Under standard conditions, the enthalpy of combustion of methane is –890 kJ mol−1.

Patrícia

C$50

60-min

/h

Psychology Professional with Experience in Child and Elderly CareTranslate this text using Google Translate.

Psychology Professional with Experience in Child and Elderly CareTranslate this text using Google Translate.

I have a Master's Degree in Clinical Psychology and have practical experience working with children and the elderly. In addition to my academic background, I gained valuable experience as an Au Pair in the Netherlands, where I cared for and supported the development of children, organized educational and recreational activities, and helped with their emotional and behavioral growth. Furthermore, as part of my psychology internship, I worked in a temporary care center for children at risk, where I provided emotional and psychological support, assisted in their development, and worked closely with a multidisciplinary team to ensure their well-being and safety. I also have experience working in a care home for the elderly, where I provided emotional and psychological support, assisted with the adaptation and well-being of the residents, and collaborated with the team to enhance their quality of life. These two experiences gave me a broad understanding of the needs of different age groups and the ability to adapt to the specific needs of each person, whether a child or an elderly individual. I am fluent in Portuguese and have an intermediate level of English. I am willing to adapt to your specific needs and look forward to contributing positively and meaningfully, whether working with children or the elderly.

Ounir Abde

C$41

60-min

/h

Learn Math with Clarity – Support for Primary to High SchoolTranslate this text using Google Translate.

Learn Math with Clarity – Support for Primary to High SchoolTranslate this text using Google Translate.

Whether you're building the basics or preparing for major exams, my math lessons are fully tailored to support students aged 7 to 18 in growing their skills, confidence, and academic performance. 📚 What I Offer I provide personalized one-on-one lessons based on each student's level, curriculum, and learning goals. My sessions combine clear explanations, step-by-step practice, and real engagement to make math both understandable and enjoyable. 🧒 Ages 7–11 (Primary School) Basic arithmetic (addition, subtraction, multiplication, division) Fractions, decimals, and percentages Word problems and logic games Geometry basics (shapes, measurements) Building confidence and developing strong number sense ➡️ Goal: Establish a strong foundation and enjoy learning math! 👦👧 Ages 12–15 (Middle School / Lower Secondary) Pre-algebra and algebra Ratios, proportions, and percentages Geometry (angles, symmetry, area, volume) Introduction to equations and graphs Mental math and problem-solving strategies ➡️ Goal: Deepen understanding and prepare for higher-level math. 👨‍🎓 Ages 16–18 (High School) Algebra I & II, functions, and inequalities Geometry and trigonometry Probability and statistics Pre-calculus and introductory calculus Exam preparation (GCSE, A-levels, IB, French Bac, Dutch HAVO/VWO, etc.) ➡️ Goal: Master complex topics and succeed in exams with confidence. 🛠️ Skills Developed Logical reasoning and analytical thinking Clear written solutions and explanation skills Exam techniques and time management Independent learning habits Real-life math applications ✅ Why Choose My Lessons? Patient, clear, and student-centered teaching Bilingual support in French or English Experience with international and national curricula Interactive tools and personalized progress tracking Let’s make math less stressful and more empowering—together.

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