The temperature value in the Ideal Gas Law must be in absolute units (Rankine or Kelvin ) to prevent the right-hand side from being zero, which violates the pressure-volume-temperature relationship. As long as the units are consistent, either approach is acceptable. Various values for R are on online databases, or the user can use dimensional analysis to convert the observed units of pressure, volume, moles, and temperature to match a known R-value. R has different values and units that depend on the user’s pressure, volume, moles, and temperature specifications. The universal gas constant R is a number that satisfies the proportionalities of the pressure-volume-temperature relationship. P is the pressure, V is the volume, N is the number of moles of gas, R is the universal gas constant, and T is the absolute temperature. Combined, these form the Ideal Gas Law equation: PV = NRT. Charles’s Law identifies the direct proportionality between volume and temperature at constant pressure, Boyle’s Law identifies the inverse proportionality of pressure and volume at a constant temperature, and Gay-Lussac’s Law identifies the direct proportionality of pressure and temperature at constant volume. These specific relationships stem from Charles’s Law, Boyle’s Law, and Gay-Lussac’s Law. The Ideal Gas Law is a simple equation demonstrating the relationship between temperature, pressure, and volume for gases.
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