The second reaction in the formation of sulfuric acid occurs slowly. no2 is added to the reaction to speed it up. in which form would this substance be a homogeneous catalyst for this reaction? no2(g) no2(l) no2(s) no2(aq)

NO2 (g)

If the catalyst and the reactants are in same phase, the catalysis is called homogeneous catalysis and the catalyst is called a homogeneous catalyst.

H2SO4 is usually synthesized by Contact process

The 1st step of contact process involves the reaction of sulfur and oxygen to produce sulfur dioxide.

In 2nd step sulfur dioxide is converted into sulfur trioxide by reacting it with O2 in the presence vanadium pentaoxide. We can see that both the reactants are in gaseous form so we use N02 in gaseous form.

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.

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.