A constant characterizing these substances equals the difference between two types of heat capacity, per Mayer’s relation. These substances do not change temperature while undergoing a Joule expansion. (-5[1])A fugacity (10[1])coefficient of 1 characterizes these substances, (10[1])which have a value of 0 for the “b” coefficient measuring excluded volume in the van der Waals (-5[1])equation. Avogadro’s number (-5[1])times the (10[1])Boltzmann (10[1])constant equals a constant named for these substances, which are (10[1])typically assumed to have no intermolecular (10[1])forces. (-5[1])For 10 points, 8.314 joules per mole-kelvin is the value of a constant named for what (10[1])substances, governed by the equation “PV (10[1])equals nRT”? (10[1])■END■ (10[3])