Is heat of fusion an extensive or intensive property? why?

Temperature is an intensive property, while heat is an extensive property. An intensive property means that the amount of substance present will not change the specific trait. Calorimetry, heat of fusion and heat of vaporization calculations.

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.