Does HF or H2O have a higher boiling point?
H2O has a higher boiling point than HF because it contains twice as many H- bonds, despite these being individually weaker.
Why does HF have lower boiling point than H2O?
The reason is the number of hydrogen bonds formed between the molecules of HF and H2O respectively. Even though F is more electronegative than O, and ,therefore, can form stronger hydrogen bonds than O, the hydride of F (HF) has a lower boiling point than the hydride of O (H2O).
Why do H2O and HF have abnormally high boiling point?
In each HF molecule, the hydrogen nucleus is rather poorly shielded by a thin electron cloud (only two electrons), and much of that electron cloud has been distorted toward the highly electronegative fluorine atom. Thus hydrogen bonding can account for the unusually high boiling points of NH3, H2O, and HF.
Which is more polar H2O or HF?
HF is more polar. This is because electronegativity difference between H and F bond is greater than between H and O, and thus H-F bond is more polar than H-O bond.
Why H2O has higher boiling point?
Water has an unusually high boiling point for a liquid. Water is made up of oxygen and hydrogen and can form hydrogen bonds, which are particularly strong intermolecular forces. These strong intermolecular forces cause the water molecules to “stick” to one another and resist transition to the gaseous phase.
Why is HF weaker than H2O?
Explain your reasoning. The H–F bond is more polar than H–O so is easier to break HF into H+ and F- than to break H2O into H+ and OH-. Hence HF is stronger acid than H2O. S is much larger atom than O, so the H–S bond is much longer and weaker than H–O; hence H2O is weaker acid than H2S.
Why does HF have a high boiling point?
– The other halogens are not as electronegative and so other hydrogen halides cannot form hydrogen bonds between molecules. Only London Forces are formed. – Therefore more energy is required to break the intermolecular forces in HF than the other hydrogen halides and so it has a higher boiling point.
Why H2O have higher boiling point?
Why H2O has higher boiling point compared to H2S?
Water has a higher boiling point than hydrogen sulphide. The intermolecular attractions between water molecules are stronger than H2S molecules due to hydrogen bonding in H2O due to high electronegativity and small size of oxygen atom.
Which of the following sentence is correct about H2O and HF?
The correct answer is a and b. H−F and H-O bonds are polar due to the high electronegativity of fluorine and oxygen respectively. Hence HF and H2O are polar molecules.
Why is HF is polar while h2 and f2 are not polar?
F2 is non polar because both the bonding atoms are same thus there is no electronegativity difference between the atoms. Thus the electron pair will lie exactly in the middle of the two atoms thus there is no generation of poles.
Why h20 has a higher boiling point than H2S?
Why does H20 have a higher boiling point than NH3?
why has h20 got a higher boiling point than nh3 if nh3 has 3 hydrogen bonds and h20 has 2? Nitrogen is less electronegative than Oxygen,thus meaning that O forms stronger hydrogen bonds than Nitrogen.Thus meaning that O requires a higher amount of energy to break up the hydrogen bonds(boiling point).
What is the melting point of H20?
The melting point of water is the temperature at which it changes from solid ice into liquid water. The solid and liquid phase of water are in equilibrium at this temperature. The melting point depends slightly on pressure, so there is not a single temperature that can be considered to be the melting point of water. However, for practical purposes, the melting point of pure water ice at 1 atmosphere of pressure is very nearly 0 °C, which is 32 °F or 273.15 K.
What factors affect the boiling point?
Pressure. The biggest determinant of a liquid’s boiling point is the surrounding pressure.
Why does adding salt to water increase the boiling point?
Many cooks add salt to boiling water and many recipes recommend it.