facebook

Science lessons in Makkah Province

Find your perfect private science tutor in Makkah Province.
Learn science with our teachers at home or in their studio.

28 science teachers in Makkah Province

0 teachers in my wish list
+

28 science teachers in Makkah Province

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
Showing results 1 - 25 of 26341 - 25 of 2634

Our students from Makkah Province evaluate their Science teacher.

To ensure the quality of our Science teachers, we ask our students from Makkah Province to review them.
Only reviews of students are published and they are guaranteed by Apprentus. Rated 4.7 out of 5 based on 22 reviews.

Writing Spelling, Grammar Conjugation, Private lessons possible online (Bou Attouche)
Sarah
Sarah has been teaching French to my 12 year old daughter for 6 weeks to prepare her for end of tests. My daughter has massively benefited from the sessions in her confidence both reading and speaking. Highly recommend Sarah!
Review by KAL