Determine the heat of reaction (δhrxn) for the combustion of ethanol (c2h5oh) by using heat of formation data: c2h5oh (l) + 3 o2 (g) → 2 co2 + 3 h2o (g)

Explanation:

Where and are number of moles of product and reactant respectively (equal to their stoichiometric coefficient).

is standard heat of formation.

So,

or,

or,

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.