Question

The melting point of H₂O(s) is \({\rm{0}}\)°C. Would you expect the melting point of H₂S(s) to be \({\rm{ - 8}}{{\rm{5}}^{\rm{^\circ }}}\)C, \({{\rm{0}}^{\rm{^\circ }}}\)C, or \({\rm{ - 18}}{{\rm{5}}^{\rm{o}}}\)C? Explain your answer.

Short answer

The melting point of H₂S will be \({\rm{ - 8}}{{\rm{5}}^{\rm{o}}}\)C.

Step-by-step solution

Definition of Melting point-

The melting point of a liquid is the temperature at which it changes its phase from solid to a liquid at atmospheric pressure.

Determining the melting point of H2S

Water has a greater melting point than H₂S because it forms hydrogen bonds, which are stronger intermolecular forces than the dipole dipole interaction seen in H₂S.

As a result, the melting point of H₂S will be \({\rm{ - 8}}{{\rm{5}}^{\rm{o}}}\)C.