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
Positive and Negative Affect Schedule between the two. Previous mood scales for children have been shown to reliably capture the former relationship but not the latter; the PANAS-C was created as a tool with better discriminant validity for child assessment. Similar to the development of the original PANAS, the PANAS-C drew from terms of the PANAS-X and eliminated several terms with insufficient correlations between the term and the affective construct after preliminary analyses with a non-clinical sample of children. The final version of the measure consists of 27 items: 12 positive affect terms and 15 negative affect terms. Despite the purpose of its development, however,