Is CH4 or SiH4 stronger?

The strength of these forces increases with the number of polarizable electrons and therefore usually increases with molecular weight of the molecule. SiH4 molecules have a greater number of electrons (greater molecular weight) than CH4 molecules. Hence boiling point of SiH4 is greater than boiling point of CH4.

Why is Hcch more acidic than CH4?

Now in between CH4,NH3 as N is more electronegative compared to C it attracts the bonding elctron pair more towards itself and the bond becomes more polarised and vulnarable towards protonation. So NH3 becomes more acid8c than CH4 and thus your problem is solved.

Which is more acidic CH4 or HF?

H bond becomes more polar. The second-row nonmetal hydrides, for example, become more acidic as the difference between the electronegativity of the X and H atoms increases. HF is the strongest of these four acids, and CH4 is one of the weakest Brnsted acids known. Thus, the more polar the bond, the stronger the acid.

Is SiH4 stronger than H2S?

SiH4 and H2S cancel out because Si and S are from period 3 so they have the biggest radii. Atomic radius decreases from right to left so F has the smallest radius and thus HF contains the strongest bond.

How does SiH4 differ from CH4?

Due to smaller size of C, its has smaller bond length than SiH4 and so bond is stronger in CH4 which makes it more stable.

Which is stronger acid h20 or HF?

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.

Which is more acidic H2S or CH4?

Order of Acidic Strength is:- Ch4<Nh3

Is PH3 an acid?

PH3 is a weaker base than NH3 because the lone pair within NH3 has a higher energy and thus serve better as a better base. Each subsequent fall on the periodic table has less energy and thus becomes less basic which in turn means it is more acidic.

Why does SiH4 have a higher boiling point than CH4?

This means that both CH4 and SiH4 have very low ΔEN which is sufficiently weak to have permanent dipole-dipole intermolecular attraction. Therefore, dipole-dipole intermolecular forces seem to be same in both the molecules and cannot explain why SiH4 has a higher boiling point.

Why does CH4 evaporate faster than other compounds?

Another reason is that CH4 is significantly less massive than the other compounds. Evaporation requires energy to escape the liquid state. The bigger the molecule, the more energy, which generally will require a higher temperature if other effects are similar.

Why is CH4 more stable than other polar molecules?

So the answer is that CH4 is a compact molecule mostly H’s around it with less interaction to the central C versus larger central atoms (Si/Ge/Sn) which have much larger sizes and more electrons for easier induced polarizability between H and the central atoms. Reminds me of why SF6 is so unusually stable (versus SF4 and SF2)! , MSc.

Why is H+ a better acid than HF?

While in F and H+, the bond length is significantly less and thus strengthening the bond. Therefore the bond is difficult to break. Therefore HI is better acid as the H+ is dissociated faster while HF is not a good acid due to its low dissociation enthalpy.