What kind of attractive forces must be overcome to sublime co2?

Sublimation is a process of converting the phase of a certain substance from solid to gas directly, without passing through the liquid state. In order to do this, forces should be overcome through application of heat or any other method. 

The intermolecular forces that hold together the components or the atoms in the compound CO2 is the London-dispersion forces. 

Hno3(aq) → h+(aq) + no3−(aq). picture ii best represents the strong acid hno3. strong acids are strong electrolytes