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6.8 General or Ideal Gas Equation The General or Ideal Gas Equation is obtained by combining relations such as Boyle’s Law, Charles’ Law and Avogadro’s Law.
This relation is referred to as ’Ideal gas Equation’ as it holds good only when the gases are behaving as 'ideal' or perfect gases. R can be calculated as follows : We know that 1 mole of an ideal gas occupies 22.4 liter at S.T.P. (Standard Temperature & Pressure, i.e 1 atm. pressure and 273 K ) Units of Gas constant R 1) R = 0.082 liter atm deg^{1} mol^{1} 2) R = 8.31 ´ 10^{7} ergs deg^{1} mol^{1} 3) R = 8.31 J deg^{1} mol^{1} 4) R = 2 cal K^{1} mol^{1} Finally at Glance

6.1 The Gaseous States Properties 