Entirely different things affect the melting points of covalent compounds and ionic compounds.
The melting points of covalent compounds are affected by which intermolecular force affects it and how strong they are: The intermolecular forces are: London forces, dipole to diploe forces and hydrogen bonding. Which ones are happening depends on the molecule. You'll have to research each force to understand how it works.
For ionic compounds it is due to charge density of either the anion or the cation: which is the relative charge/ionic radii. A greater charge density means a higher boiling point.
The factors affecting the melting point of a substance include the strength of intermolecular forces, molecular weight, crystal structure, and impurities present in the substance. Stronger intermolecular forces require a higher temperature to overcome, resulting in a higher melting point. Heavier molecules generally have higher melting points due to increased mass and surface area. Crystal structure can affect how tightly packed molecules are, influencing the ease of melting. Impurities can disrupt the regular crystal lattice structure, lowering the melting point.
There are basically two types of bonding in substances that affect the boiling point. Some compounds are composed of extensive networks of atoms held together by either ionic or covalent bonds. These network substances have very high melting and boiling points. NaCl is an example of an ionic network and SiO2 is an example of a covalent network.
The key factors that affect the boiling points of molecular compounds are the intermolecular forces which attract one molecule to another.
For covalent compounds these intermolecular forces are called van der Waals forces and consist of hydrogen bonding, dipole-dipole attraction, and London dispersion forces. Hydrogen bonding is usually stronger than dipole-dipole interactions. London dispersion forces, often weaker forces, are found between all molecules, even if other van der Waals forces are present.
The boiling point of a solution is also affected by the ambient pressure. Boiling occurs at a temperature where the vapor pressure of the liquid is equal to the ambient pressure.
The third thing that affects the boiling point of a solution is any substance that is dissolved in the liquid. The more particles (ions or molecules) there are dissolved in the solution, the higher the boiling point.
Melting point. The temperature at which a substance freezes is the same as its melting point, as this is the temperature at which a solid substance transitions into a liquid state.
It indicates that the substance has turned to a liquid.
what the heck are you asking? the melting point is not a substance. it's a temperature in which the substance starts to melt
does the melting point of a substance change over time
A substance becomes solid above its melting point. At temperatures below the melting point, the substance typically exists in a liquid state.
it decreases.
Celsius is a measure of temperature not a substance, and therefore it has no melting point. What is the melting point of what material in Celsius? [You haven't named the substance you want the melting point of/for]
It has reached its melting point.
Melting point. The temperature at which a substance freezes is the same as its melting point, as this is the temperature at which a solid substance transitions into a liquid state.
The term defined as the temperature at which a substance changes from a solid to a liquid state is called the melting point.
It indicates that the substance has turned to a liquid.
what the heck are you asking? the melting point is not a substance. it's a temperature in which the substance starts to melt
The melting temperature of a substance is the temperature at which it changes from a solid to a liquid phase. It is a specific temperature characteristic for each substance and can vary depending on factors such as pressure and impurities present.
does the melting point of a substance change over time
The boiling point is the temperature at which a substance changes from a liquid to a gas, while the melting point is the temperature at which a substance changes from a solid to a liquid. These properties are unique to each substance and can be used to identify or characterize them.
A substance's melting point is the temperature at which it changes from a solid to a liquid state. It is unique to each substance and does not necessarily match the melting point of any other substance.
A substance becomes solid above its melting point. At temperatures below the melting point, the substance typically exists in a liquid state.