4.2 Consider a gas with a molar volume 82% that of a perfect gas. Calculate the compression factor. [3] b. Interpret the meaning of the value obtained in a. [2] 4.3 Explain the following statements: a. Isolated system. [2] [2] b. Mechanical equilibrium. [2] C. Adiabatic system [2] d. Extensive property. [2 [2] e. Heat