Asugar solution is being evaporated in a triple-effect evaporator using saturated steam at 230 kpa. the pressure in the vapour space of the last effect is 32.7 kpa (abs). the overall heat transfer coefficients are u1 2.55, u2 2.2 and us 1.6 kw/m2k. the heat transfer areas are equal. the bpr in each effect are 0.66 c, 1.2 c and 2.1 respectively. no temperature adjustments are required to be made. 2.1. determine the boiling points in all three effects.

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible? a. attractive forces between gas particles are negligible because the particles of an ideal gas are moving so quickly. b. collisions between gas particles are elastic; there is no net gain or loss of kinetic energy. c. gases consist of a large number of small particles, with a lot of space between the particles. d. gas particles are in constant, random motion, and higher kinetic energy means faster movement.

How did planetesmals form planets? a. they broke apart into smaller chunks. b. they collided and stuck together. c. they cooled and pulled ice together. d. they began to rotate.

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space