Ideal gas except for the specification of these constants. The results of the quantum Boltzmann gas are used in a number of cases including the Sackur–Tetrode equation for the entropy of an ideal gas and the Saha ionization equation for a weakly ionized plasma. The classical thermodynamic properties of an ideal gas can be described by two equations of state: The ideal gas law is the equation of state for an ideal gas, given by: where The ideal gas law is an extension of experimentally discovered gas laws. It can also be derived from microscopic considerations. Real fluids at low density and
Negative and positive rights obligates others to act with respect to the right holder. In the framework of the Kantian categorical imperative, negative rights can be associated with perfect duties while positive rights can be connected to imperfect duties. Belief in a distinction between positive and negative rights is usually maintained, or emphasized, by libertarians, who believe that positive rights do not exist until they are created by contract. The United Nations Universal Declaration of Human Rights lists both positive and negative rights (but does not identify them as such). The constitutions of most liberal democracies guarantee negative rights, but not all include positive