1. Consider the following equation as a modified EOS which introduces the occupied volume for molecules. P=RT/(V-b) a) Express the compressibility factor (z) for a substance that behaves according to this EOS. b) is the compressibility factor greater or less than that for an ideal gas? 2. Again, consider the EOS given by PERT/(V-b). a) Develop an expression for the isothermal compressibility (KT) for a gas obeying this EOS. b) Is the isothermal compressibility of a gas obeying this EOS greater or less than that of an ideal gas