Predict which of the following has the lowest boiling point. A) SbH₃ B) AsH₃ C) NH₃ D) BiH₃ E) PH₃

Question

Quizplus · Accepted Answer

The boiling points of the elements generally increase with increasing atomic size, as the strength of the dispersion forces between the molecules increases. As PH₃ is the smallest of the given molecules, it has the weakest dispersion forces and therefore the lowest boiling point. The other molecules are larger and have more electrons, resulting in stronger dispersion forces and higher boiling points.

Predict Which of the Following Has the Lowest Boiling Point