b) In gases the reasons of which molecular motions are effective to transfer bl) momentum ? b2) heat? b3) mass? Transferred quantity Molecular motion Reasons Momentum Heat Mass c) Express viscosity, thermal conductivity and diffusion coefficient equations for ideal gases as a function of temperature, pressure, molcular weight, size of molecule using the corresponding equations [Eqs. (16A.11a), (16A.10a), (16A.9), respectively) given in terms of mean free path and mean velocity. d) Discuss the effect of temperature, pressure, molecular weight and size on viscosity, thermal conductivity and diffusion coefficient. Parameter Viscosity Thermal conductivity Diffusion coefficient Pressure Temperature Molecular weight Molecular size