What is an intensive property? give some examples
What is an extensive property? give some examples
An intensive property is a characteristic or property of a substance that is independent of the quantity or size of the sample. It remains the same whether the substance is in a small or large amount.
Examples of intensive properties include:
1. Temperature: The temperature of a substance remains the same regardless of the amount of the substance.
2. Density: The density of a material remains constant regardless of the sample's size.
3. Melting point: The melting point of a substance does not change with the size or quantity of the sample.
4. Boiling point: The boiling point remains the same regardless of the amount of the substance.
On the other hand, an extensive property is a characteristic or property of a substance that depends on the quantity or size of the sample. It changes when the size or amount of the substance changes.
Examples of extensive properties include:
1. Mass: The mass of a substance increases or decreases with the size or quantity of the sample.
2. Volume: The volume of a substance increases or decreases with the size or quantity of the sample.
3. Total energy: The total energy of a system increases or decreases with the size or quantity of the sample.
4. Number of moles: The number of moles of a substance is directly proportional to the size or quantity of the sample.
In summary, intensive properties do not change with the amount of substance, while extensive properties change depending on the quantity or size of the substance.
Are all elements pure substances? Are all pure substances elements? Why or why not?
No, not all elements are pure substances, and not all pure substances are elements.
Elements are pure substances because they are composed of only one type of atom. Examples of elements include hydrogen (H), oxygen (O), and iron (Fe). They cannot be further broken down into simpler substances by physical or chemical means. Elements have distinct chemical and physical properties.
On the other hand, pure substances can be compounds or elements. Pure substances are substances that have a constant composition throughout and are homogeneous in nature. Compounds are pure substances composed of two or more elements chemically combined in fixed proportions. Examples of compounds include water (H2O), carbon dioxide (CO2), and table salt (NaCl). They can be decomposed into their constituent elements through chemical reactions.
Therefore, while all elements are pure substances, not all pure substances are elements.
Why are not all pure substances elements, give short explanation
Not all pure substances are elements because pure substances can be compounds as well. Compounds are composed of two or more elements chemically combined in fixed proportions. While elements are made up of a single type of atom, compounds are formed when atoms of different elements combine together in specific ratios. Pure substances can exist in the form of both elements and compounds, depending on their composition.
What is Intensive property and extensive property
An intensive property is a characteristic or property of a substance that is independent of the quantity or size of the sample. It remains the same regardless of the amount of the substance. Examples of intensive properties include temperature, density, melting point, and boiling point. Regardless of the amount of these substances, their temperature, density, melting point, and boiling point will remain constant.
An extensive property, on the other hand, is a characteristic or property of a substance that depends on the quantity or size of the sample. It changes when the size or amount of the substance changes. Examples of extensive properties include mass, volume, total energy, and number of moles. The mass and volume of a substance increase or decrease proportionally with the size or quantity of the sample. Similarly, the total energy and number of moles are directly related to the amount of the substance.
When atoms are rearranged into new molecules a chemical or physical change ?
When atoms are rearranged into new molecules, it is considered a chemical change. Chemical changes involve the breaking and forming of chemical bonds, resulting in new substances with different chemical properties. Examples of chemical changes include combustion, digestion, and rusting. In contrast, physical changes do not change the chemical composition of a substance, only its physical state or appearance. Examples of physical changes include changes in state (such as melting or freezing) and changes in shape or size (such as cutting or crushing).
An intensive property is a property that does not depend on the size or amount of the material being observed. In other words, it remains constant regardless of the quantity of the substance. Here are some examples of intensive properties:
1. Density: Density is the mass of an object divided by its volume. It remains the same for a substance regardless of its size or quantity. To find the density of an object, divide its mass (measured in kilograms) by its volume (measured in cubic meters).
2. Melting point: The melting point of a substance is the temperature at which it changes from a solid to a liquid phase. It remains the same regardless of the amount of the substance present. The melting point is determined through experimental methods and can be found in reference books or databases.
3. Boiling point: Similar to the melting point, the boiling point is the temperature at which a substance changes from a liquid to a gas phase. It is also an example of an intensive property.
On the other hand, an extensive property is a property that does depend on the size or amount of the material being observed. It varies with the amount of substance present. Here are some examples of extensive properties:
1. Mass: Mass is the amount of matter in an object and is directly proportional to the quantity or size of the material.
2. Volume: Volume is the amount of space occupied by an object or substance. It depends on the amount of the substance present. The volume can be measured in units like liters, cubic meters, or cubic centimeters.
3. Energy: Energy is an extensive property because it depends on the amount of material under consideration. For example, the total energy of an object can be calculated by summing up the energies of all its individual components.
It's important to note that whether a property is intensive or extensive depends on the substance being observed.