جميع المواضيع المتعلقة بـ ‘chemical’

 

ملخص الفصل الثالث عشر :الاتزان الكيميائي من كتاب الكيمياء للعالم زومدال Chapter 13 notes: Chemical Equilibrium, Chemistry Zumdahl

ملخص الفصل الثالث عشر :الاتزان الكيميائي من كتاب الكيمياء للعالم زومدال Chapter 13 notes: Chemical Equilibrium, Chemistry Zumdahl

الكيمياء العامة 2 ، الكيمياء العامة 102 ، General Chemistry

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ملخص الفصل الرابع :أنواع التفاعلات الكيميائية و العلاقات الكمية للمحاليل من كتاب الكيمياء للعالم زومدال Chapter 4 notes: Types of Chemical Reactions and Solution Stoichiometry , Chemistry Zumdahl

ملخص الفصل الرابع :أنواع التفاعلات الكيميائية و العلاقات الكمية للمحاليل من كتاب الكيمياء للعالم زومدال Chapter 4 notes: Types of Chemical Reactions and Solution Stoichiometry , Chemistry Zumdahl

الكيمياء العامة 1 ، الكيمياء العامة 101 ، General Chemistry

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ملخص الفصل الثالث :العلاقات الكمية الكيميائية من كتاب الكيمياء للعالم زومدال Chapter 3 notes: Stoichiometry , AP chemistry Zumdahl

ملخص الفصل الثالث :العلاقات الكمية الكيميائية من كتاب الكيمياء للعالم زومدال Chapter 2 notes: Stoichiometry , AP chemistry Zumdahl

الكيمياء العامة 1 ، الكيمياء العامة 101 ، General Chemistry

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ملخص الفصل الأول :أساسيات الكيمياء للعالم زومدال Chapter 1 chemistry foundation Notes Zumdahl AP

ملخص الفصل الأول أساسيات الكيمياء للعالم زومدال Chapter 1 chemistry foundation Notes Zumdahl

الكيمياء العامة 1 ، الكيمياء العامة 101 ، General Chemistry

 

لتنزيل كل شريحة على حدة يرجى الضغط

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Chemical Equilibrium

Chemical equilibrium: “A reversible reaction occur with the rate of the forward reaction equal to the backward reaction.”  Such an equilibrium is called chemical equilibrium, the two opposing processes involve a change of chemical species. Moreover the composition of the reactant and products does not change with time (if temperature, concen­tration etc. remain unaltered because the amount of products. formed at .a given time is equal to that…

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Chemical Nomenclature

Chemical nomenclature is the system of names that chemists use to identify compounds precisely. The systematic method of naming compounds is vital to the study of chemistry, because when a new substance is formulated, it must be named in order to distinguish it from all other substances.

Using this systematic method of naming compounds, the positive part is named and written first, followed by the negative part. The…

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Mole and chemical formulas

Because the individual atoms in a compound are combined in integer ratios, and each element has a specific atomic mass, it is possible to use mole calculations to determine chemical formulas. The two types of chemical formulas are molecular formulas and the empirical formulas.

– Often, the empirical formula is the same as the molecular formula.

The molecular formula shows the actual number of atoms in a substance….

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Chemical Formulas

There are two types of compounds: molecular and ionic compounds. For molecular compounds, a molecular formula represents the number and kinds of atoms in the molecule. The molecular formula also tells us the lowest whole number ratio between the atoms in the compound. For example, water is represented by the formula H2

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Energy

Like matter, energy can be classified in different ways. For example, energy can either be kinetic or potential.

Kinetic energy is energy of motion. Gases are made of molecules that have more kinetic energy than molecules in the solid phase of that substance. For example, water molecules in steam have greater kinetic energy than molecules in liquid water.

Potential energy is energy…

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Physical, Chemical, and Nuclear Changes

Substances can undergo three type of changes:

Physical changes

Chemical changes (also known as chemical reactions)

Nuclear changes (also known as nuclear reactions)

In a physical change the appearance (color, shape, etc.) of the substance may change, but the substance will remain the same substance. A phase change is an example of a physical change….

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