Yes, impurities have important effects on the melting and boiling point of materials.
The melting point and boiling point of a substance come under the category of phase changes. And the temperature at which these phase changes occur are related to the intermolecular forces holding the molecules of the substance together.
Each substance has a different effect on the boiling point.
No, acidity does not directly affect the boiling point of a substance. The boiling point is mainly determined by the intermolecular forces within a substance and the external pressure exerted on it. Acidity may affect the chemical properties of a substance, but it does not have a direct impact on its boiling point.
Neither are actually points as such, but lines on a scale comparing temperature and pressure. Increase one and the size of the other goes up as well before the material will change state. So in effect, yes, the points do change, depending on the environment they are in at the time.
Salt water has a lower freezing point and a higher boiling point.
Impurities can lower the melting point and raise the boiling point of a pure substance. This occurs because impurities disrupt the crystal lattice structure of the substance, making it harder for the molecules to align and transition between solid and liquid states. The presence of impurities can also alter the intermolecular forces between molecules, affecting the energy required for melting and boiling.
Leaving aside the obvious deficiencies in the question (1.2 WHAT? What substance?)... For most substances pressure has only a tiny effect on the melting point, and enormous pressures are required to change the melting point significantly (in contrast to boiling point, where pressure has a relatively much greater effect).
The melting point and boiling point of a substance come under the category of phase changes. And the temperature at which these phase changes occur are related to the intermolecular forces holding the molecules of the substance together.
Pressure
When heat is applied to a substance, it causes the molecules in the substance to gain energy and move faster, leading to an increase in temperature. This can result in phase changes, such as melting or boiling, depending on the substance. In chemical reactions, heat can also provide the activation energy needed for the reaction to occur.
A phase change does not affect the mass of a substance because mass is a constant property of matter. During a phase change, such as melting or boiling, the substance's molecular arrangement changes, but the total mass remains the same.
Each substance has a different effect on the boiling point.
No, acidity does not directly affect the boiling point of a substance. The boiling point is mainly determined by the intermolecular forces within a substance and the external pressure exerted on it. Acidity may affect the chemical properties of a substance, but it does not have a direct impact on its boiling point.
The boiling point depends on altitude (pressure). The effect on the melting point is not significant.
Reduced pressure in a vacuum lowers the boiling point of a substance by decreasing the pressure on the liquid, causing it to vaporize more easily. This leads to a decrease in the melting point as well, as the substance transitions from solid to liquid more readily in a vacuum environment.
The melting point of magnesium is 1,202 degrees Fahrenheit (650 degrees Celsius) and its boiling point is 1,994 degrees Fahrenheit (1,090 degrees Celsius). The melting point of chlorine is -150.7 degrees Fahrenheit (-101.5 degrees Celsius) and its boiling point is -29.27 degrees Fahrenheit (-34.04 degrees Celsius).
The melting point of the substance should not change as all substances have specific melting, boiling, condensation, and freezing points. It would, however, require more energy (in this case, heat) to melt the increased quantity of paradichlorobenzene in the same amount of time.