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What role does molecular attraction play in determining the physical properties of substances?
Molecular attraction influences the physical properties of substances by affecting how molecules interact with each other. Stronger attractions lead to higher melting and boiling points, while weaker attractions result in lower melting and boiling points. Additionally, molecular attraction can impact the viscosity, solubility, and conductivity of substances.
What causes different melting points?
Different melting points are caused by variations in molecular structures and intermolecular forces between substances. Substances with strong intermolecular forces will have higher melting points, while substances with weaker forces will have lower melting points. Additionally, factors such as molecular weight, shape, and polarity also contribute to the melting point of a substance.
What causes the differences in melting points and boiling points between ionic and covalent compounds molecular substances?
The differences in melting and boiling points between ionic and covalent compounds are due to the strength of the intermolecular forces present. Ionic compounds have strong electrostatic forces of attraction between oppositely charged ions, resulting in higher melting and boiling points. Covalent compounds have weaker intermolecular forces such as London dispersion forces or dipole-dipole interactions, leading to lower melting and boiling points compared to ionic compounds.
What is a characteristic property of molecular substances?
A characteristic property of molecular substances is that they have relatively low melting and boiling points compared to ionic compounds, due to the weaker intermolecular forces between molecules. Additionally, molecular substances are formed from discrete covalently bonded molecules, allowing them to exist as discrete units.
Contrast ionioc and molecular substances in terms of the types of attractive forces that govern their behavior?
Ionic substances are held together by electrostatic forces of attraction between positively and negatively charged ions, while molecular substances are held together by various types of intermolecular forces such as hydrogen bonding, dipole-dipole interactions, and London dispersion forces. Ionic substances have higher melting and boiling points due to the strong electrostatic forces, while molecular substances typically have lower melting and boiling points as the intermolecular forces are weaker.
Why do molecular compounds have low melting points and low boiling points relative ionic substances?
The bonds in the molecule are weaker.
What role does molecular attraction play in determining the physical properties of substances?
Molecular attraction influences the physical properties of substances by affecting how molecules interact with each other. Stronger attractions lead to higher melting and boiling points, while weaker attractions result in lower melting and boiling points. Additionally, molecular attraction can impact the viscosity, solubility, and conductivity of substances.
Are melting points of molecular substances higher than those of ionic substance?
Ionic substances have higher melting points.
How are the melting points and the boiling points of molecular compounds different from ionic compounds?
Ionic bonds are significantly resistant to heat, while molecular bonds are broken more easily with the addition of heat energy. Due to this, ionic compounds have much higher boiling points than molecular substances in most cases.
What causes different melting points?
Different melting points are caused by variations in molecular structures and intermolecular forces between substances. Substances with strong intermolecular forces will have higher melting points, while substances with weaker forces will have lower melting points. Additionally, factors such as molecular weight, shape, and polarity also contribute to the melting point of a substance.
How are the properties of molecular compounds poor conducters of electricity?
Because have lower melting points and boiling points
What causes the differences in melting points and boiling points between ionic and covalent compounds molecular substances?
The differences in melting and boiling points between ionic and covalent compounds are due to the strength of the intermolecular forces present. Ionic compounds have strong electrostatic forces of attraction between oppositely charged ions, resulting in higher melting and boiling points. Covalent compounds have weaker intermolecular forces such as London dispersion forces or dipole-dipole interactions, leading to lower melting and boiling points compared to ionic compounds.
Do elements compounds and mixtures have fix melting and boiling point?
Elements have fixed melting and boiling points, while compounds have varying melting and boiling points depending on their composition. Mixtures do not have fixed melting and boiling points, as they are composed of multiple substances which each have their own individual melting and boiling points.
What is a characteristic property of molecular substances?
A characteristic property of molecular substances is that they have relatively low melting and boiling points compared to ionic compounds, due to the weaker intermolecular forces between molecules. Additionally, molecular substances are formed from discrete covalently bonded molecules, allowing them to exist as discrete units.
Contrast ionioc and molecular substances in terms of the types of attractive forces that govern their behavior?
Ionic substances are held together by electrostatic forces of attraction between positively and negatively charged ions, while molecular substances are held together by various types of intermolecular forces such as hydrogen bonding, dipole-dipole interactions, and London dispersion forces. Ionic substances have higher melting and boiling points due to the strong electrostatic forces, while molecular substances typically have lower melting and boiling points as the intermolecular forces are weaker.
Why do the melting and boiling points of a particular substance virile?
The melting and boiling points of a substance are determined by the strength of intermolecular forces between its molecules. Substances with stronger intermolecular forces, such as hydrogen bonding or dipole-dipole interactions, will have higher melting and boiling points. Conversely, substances with weaker forces, like London dispersion forces, will have lower melting and boiling points. Therefore, the specific type and strength of intermolecular forces present in a substance dictate its melting and boiling points.
Why do molecular compounds have low melting points and low boiling points relative to ionic substances?
The melting points and boiling points of molecular covalent compounds (ones with discrete molecules) are lower than ionic solids and giant molecule covalent compounds like (silica, SiO2) because the forces that attract them together in the solid and the liquid states (van der waals, hydrogen bonding and dispersion forces) are weaker than ionic (or covalent) bonds.
