At standard temperature and pressure, bromine (Br.) is a red liquid. Bromine sublimes when the temperature is -25 °C and the pressure is 101.3 kPa. The phase diagram for bromine is shown below. Use this diagram for questions (1) – (9) 100 80 60 40 20 -30 - 10 20 40 60 Temperature ("C) (1) Label each region of the graph as solid, liquid, or gas. (2) Label the triple point, normal melting point, and normal boiling point on the graph and estimate their values in the spaces below. Normal Melting Point = Normal Boiling Point = Triple Point = (3) Use the letter 'A' to label the line that gives the conditions for equilibrium between solid and liquid phases of bromine, the letter B to label the curve that gives the conditions for equilibrium between liquid and vapor phases of bromine, and the letter C' to label the curve that gives the conditions for equilibrium between solid and vapor phases of bromine. Pressure (kPa)

B. Drive the Kremser Equation which used for Algebraic Determination of the Number of Ideal Stages.

2C.4 Falling-cylinder viscometer (see Fig. 2C.4). A falling-cylinder viscometer consists of a long vertical cylindrical container (radius R), capped at both ends, with a solid cylindrical slug (ra- dius KR). The slug is equipped with fins so that its axis is coincident with that of the tube. One can observe the rate of descent of the slug in the cylindrical container when the lat- ter is filled with fluid. Find an equation that gives the viscosity of the fluid in terms of the ter- minal velocity of the slug and the various geometric quantities shown in the figure. Cylindrical slug descends- with speed t -XR- Cylindrical container filled with fluid Fig. 2C.4 A falling-cylinder viscom- eter with a tightly fitting solid cylin- der moving vertically. The cylinder is usually equipped with fins to maintain centering within the tube. The fluid completely fills the tube, and the top and bottom are closed. (a) Show that the velocity distribution in the annular slit is given by (1-)-(1+¹) In…