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21 tutoring teachers in Mecca

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21 tutoring teachers in Mecca

Trusted teacher: Thermal changes accompanying physical and chemical changes Thermal changes accompanying physical changes - melting temperature It is the temperature change when one mole of solute is dissolved in a given amount of solvent (The amount of heat energy absorbed or released when one mole of solute is dissolved in a given amount of solvent). During the dissolution process: two processes occur: A- Dissociation: the breaking of bonds (endothermic reaction) Sodium and chloride ions dissociate from the crystal lattice as a result of the ionic bond breaking. The energy absorbed to break the bond is called the heat of the crystal lattice (bond energy). - Crystal lattice temperature: It is the energy needed to break the bond between ions in the crystal lattice. B- Hydration: The dissociated ions bind with water molecules to form hydration ions (exothermic process). Rehydration temperature: It is the amount of heat released when hydrating ions bind to water molecules. If the crystal lattice temperature > heat of hydration Dilution temperature: It is the heat change per mole of solute when diluted from a concentrated solution to a dilute solution. (It is the heat change of one mole of solute when diluted in a large amount of water (about 1000 moles of solvent)). Sedimentation temperature: The amount of heat released when one mole of an insoluble substance is completely precipitated. - heat of combustion It is the amount of heat released when one mole of a substance is completely burned in an abundance of oxygen. (The reaction is always exothermic). Formation temperature: It is the amount of heat released or absorbed when one mole of a compound is formed from its elemental elements so that the elements are in their standard state. (at 25 °C, a pressure of 76 x g). Note: Heat of formation of the elements = zero
Chemistry · Physics · Science
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Only reviews of students are published and they are guaranteed by Apprentus. Rated 4.9 out of 5 based on 281 reviews.

Premium Lessons By MIT-Trained Tutor | 10+ Years Experience in IB, IGCSE, GCSE, AP, A-Levels, SAT (The Hague)
David
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It is with the utmost admiration and gratitude that I extend my effulgent endorsement for David, the epitome of mathematical tutorship. His fervor for the subject and his pupils is steadfast, and David’s commitment to ensuring proficiency and comprehension is manifest in every tutorial session. His availability is most pliable, as he exhibits a constant readiness to alter his docket to accede to the necessities of his students. This adaptability is rare and precious quality, one that has played a seminal role in my time near the finals. Not only do he demonstrate devotion during his scheduled lessons time, for he is always approachable for additional guidance and support outside his hours. David’s unwavering dedication to the academic success of his students is truly remarkable and deeply appreciated by those who benefit from it. What distinguishes David is not solely his mastery in mathematics, but his amiable and cordial demeanour. He cultivates a genial and hospitable environment; and his pedagogy a harmonious blend of professionalism and conviviality. I consider myself fortunate to have availed myself of David’s instruction, and I cannot recommend him highly enough. In conclusion, if you seek a mathematics tutor, David Devidze should be your first port of call. His passion for the subject, commitment to his students, and affable personality makes him the ideal tutor for anyone seeking to enhance their mathematical understanding and aptitude. A true gem in the world of tutelage
Review by VALENTIN
Private French lessons for adults and teenagers with native French speaker in Co. Mayo (Newport)
Phillip
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It is always a pleasure to meet Phil for our weekly online French classes. He is a patient and kind teacher and always full of energy for our class. Phil is interested in a wide range of topics, so we always have something to talk about based on an article he selected as 'homework'. What I really appreciate about his way of teaching is that he corrects me during our conversation without breaking the flow of our talk, so I can really feel my confidence in speaking French increasing each class. I woulf highly recommend Phil if you are looking for a French tutor :)
Review by USER
Private lessons in Math, Physics, Chemistry and SVT (Brussels)
Raef
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Superb experience with Raef. I asked for his help to prepare a math assessment test with an enormous lack of basis but he accepted the challenge. I found out a nice teacher who is not afraid of explaining and repeating if necessary. I did enjoy his method with the whiteboard, it feels like you are in the same place and can interact on the same exercise. Either in English or french he will certainly be able to help you. He is super kind and flexible, I definitively recommend his services.
Review by DYLAN
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