In a chemical reaction, what is defined as the difference between the potential energy of the products and the potential energy of the reactants? 1)activation energy 2)ionization energy 3)enthalpy 4)heat of vaporization

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.