MELTING When you heat something \"faster,\" chances are you\'re heating the substance way above its melting point. Therefore, when it actually melts, you will get results showing that the melting point is lower. In fact, your data is just inaccurate. You have to heat something slowly in order to determine an accurate melting point. For instance, if I heated water at 1,000 degrees, it will start to boil quickly, but if you were trying to measure it with a thermometer, you would have no idea when it actually started to boil. Same goes with melting points. If you\'re heating it faster, it is probably because you\'re setting the temperature very high and thus you will get inaccurate results. Don\'t forget that adding two substances together may form impurities in the mixture which will result in lower melting points. BOiling 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. Solution MELTING When you heat something \"faster,\" chances are you\'re heating the substance way above its melting point. Therefore, when it actually melts, you will get results showing that the melting point is lower. In fact, your data is just inaccurate. You have to heat something slowly in order to determine an accurate melting point. For instance, if I heated water at 1,000 degrees, it will start to boil quickly, but if you were trying to measure it with a thermometer, you would have no idea when it actually started to boil. Same goes with melting points. If you\'re heating it faster, it is probably because you\'re setting the temperature very high and thus you will get inaccurate results. Don\'t forget that adding two substances together may form impurities in the mixture which will result in lower melting points. BOiling There are basically two types of bonding in substances that affect th.

1. MELTING
When you heat something "faster," chances are you're heating the substance way above its
melting point. Therefore, when it actually melts, you will get results showing that the melting
point is lower. In fact, your data is just inaccurate. You have to heat something slowly in order to
determine an accurate melting point. For instance, if I heated water at 1,000 degrees, it will start
to boil quickly, but if you were trying to measure it with a thermometer, you would have no idea
when it actually started to boil. Same goes with melting points. If you're heating it faster, it is
probably because you're setting the temperature very high and thus you will get inaccurate
results.
Don't forget that adding two substances together may form impurities in the mixture which will
result in lower melting points.
BOiling
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.

2. Solution
MELTING
When you heat something "faster," chances are you're heating the substance way above its
melting point. Therefore, when it actually melts, you will get results showing that the melting
point is lower. In fact, your data is just inaccurate. You have to heat something slowly in order to
determine an accurate melting point. For instance, if I heated water at 1,000 degrees, it will start
to boil quickly, but if you were trying to measure it with a thermometer, you would have no idea
when it actually started to boil. Same goes with melting points. If you're heating it faster, it is
probably because you're setting the temperature very high and thus you will get inaccurate
results.
Don't forget that adding two substances together may form impurities in the mixture which will
result in lower melting points.
BOiling
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.