AQA A Level Chemistry复习笔记1.6.7 Bond Enthalpies
Bond Enthalpies The amount of energy required to break one mole of a specific covalent bond in the gas phase is called the bond dissociation energy Bond dissociation energy (E) is usually ju...
AQA A Level Chemistry复习笔记1.6.6 Applications of Hess’s Law
Hess' Law Calculations You must make sure that you can apply Hess' Law effectively and calculate enthalpy changes in different situations Remember - it is the data that is important Check wh...
AQA A Level Chemistry复习笔记1.6.5 Hess' Law
Using Hess' Law Calculating ΔHr from ΔHf using Hess’s Law energy cycles The products can be directly formed from the elements = ΔH2 OR The products can be indirectly formed from the elements...
AQA A Level Chemistry复习笔记1.6.4 Calorimetry
Calorimetry Measuring enthalpy changes Calorimetry is the measurement enthalpy changes in chemical reactions A simple calorimeter can be made from a polystyrene drinking cup, a vacuum flask ...
AQA A Level Chemistry复习笔记1.6.3 Enthalpy Changes
Enthalpy Changes The total chemical energy inside a substance is called the enthalpy (or heat content) When chemical reactions take place, changes in chemical energy take place and therefore...
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作为英国方向的“塔尖尖”，牛津大学一直是很多同学梦寐以求的学术天堂。 像牛津这样的G5精英强校，究竟喜欢怎样的学生？已经收获牛津大学物理专业offer的翰林学员L同学的经历，或许能给你一些参考。 翰林L同学 牛...
AQA A Level Chemistry复习笔记1.6.2 Energy Level Diagrams
Energy Level Diagrams An energy level diagram is a diagram that shows the energies of the reactants, the transition state(s) and the products of the reaction as the reaction proceeds ( calle...
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在飞速发展的现代社会，无处不充斥着“投资”,无论是对事业的投资，还是对生活的投资,我们都需要拥有详细规划的能力,而商赛是让同学们提前进行全方位商业模拟,感受真实投资环境的最优选择。 翻看许多“大佬”的高中经...
英国大学认可的Duolingo多邻国、朗思语言考试介绍
在全球疫情下，很多地区的托福、雅思考试随时会面临取消，越来越多的海外院校宣布，其他的语言考试可以替代托福、雅思，比如英国大学认可的Duolingo多邻国、朗思语言考试介绍。 什么是多邻国英语考试 多邻国英语...
AQA A Level Chemistry复习笔记1.5.4 Effects of Forces Between Molecules
Influence of Intermolecular Forces Properties of water Hydrogen bonding in water, causes it to have anomalous properties such as high melting and boiling points, high surface tension and a h...
AQA A Level Chemistry复习笔记1.5.3 Types of Forces Between Molecules
Intramolecular Forces vs. Intermolecular Forces Intramolecular forces Intramolecular forces are forces within a molecule and are usually covalent bonds Covalent bonds are formed when the out...
AQA A Level Chemistry复习笔记1.5.2 Bond Polarity
Electronegativity Electronegativity is the power of an atom to attract the pair of electrons in a covalent bond towards itself The electron distribution in a covalent bond between elements w...
