Problem1) Draw the Lewis structure and predict the geometrie
Problem1) Draw the Lewis structure and predict the geometries of the followingmolecules.
(a) BeH2 (b) OF2 (c) PF3
Problem2) Given
(1) C(s) + O2(g) →CO2(g) ∆H = -393.5kJ
(2) 2CO(g) + O2(g) →2CO2(g) ∆H = -566.0kJ
Calculate∆H for the reaction C(s) + ½ O2(g) → CO2(g) ∆H =
Problem3) Explain,in terms of intermolecular forces,why
(1) Boiling point of O2 (-183oC)is higher than that of N2(-196oC).
(2) Boiling point of NO (-151oC)is higher than that of either O2 or N2.
Problem4) Graphene,a subject of Nobel prize in Physics in 2010,is separated fromgraphite,an ordinary carbon matter.Describe the characters of graphene andthe method to separate in terms of intermolecular forces.