According to valence bond theory, which kind of orbitals overlap to form the p−cl bonds in pcl5?

orbital.

Explanation:

Valence bond theory is the chemical bonding theory which explains the chemical bond between two atoms. Both of the two atoms shares each of the unpaired electron to form a hybrid orbital and together to form a bond.

According to the valence bond theory, P-Cl bond forms by the overlap of a phosphorus orbital with chlorine 3p orbital to form five sigma bond (P-Cl). The five orbital are single occupied. has a trigonal bipyramidal structure, and the bond angle is 90 and 120 degree. The original atomic orbital are no longer exist.

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .