You want to determine how effectively evaporization of water cools your 60 kg body at 20°c. at atmo- spheric pressure and 100°c, ahan = 40.66 kj mol- for liquid water. take cp. m of liquid and gaseous waters to be independent of temperature with constant values of 75.4 and 33.76 jk-mol-, respectively. a) devise a path for the process h2o(1, 20°c) → h2o(g, 20°c). (hint: ah is a state function.) b) determine ah vap at 20°c from your path. [43.99 kj mol-'] c) it is 20°c, you are drenched by rain, and your clothes absorb 1.00 l of water. it is also exceedingly windy so this water evaporates very quickly. determine the amount of heat at 20°c required for all of the water to evaporate. (m1,0 = 18.015 g mol-', dh,0 = 0.9928 g ml-' at 20°c) d) assume that the specific heat capacity of you and your clothes is the same as that of water (4.184 j k- g-) and determine what the drop in your body temperature would be due to this evaporation. [9.7 k]

Is a measure of the resistance to flow. a high liquid has a high resistance to flow and flows slowly. the ancients thought everything in the world was made of 4 we now know that there are 94 naturally occurring and scientists have created another 24 i am certain they will create even more. honey flows slowly because it has a high to flowing. a can be separated by physical means because it contains more than one pure substance and 2 pure substances are not chemically bonded to each other. a cannot be separated by physical means. all matter is made up of all elements are with the same number of protons. if it is just a single or many bonded together, if all of them have the same number of protons, it is an element. in a piece of pure iron metal, all the are joined together, that piece of iron metal is called elemental iron. a single of iron is called elemental iron. a mixture has differences from place to place. we might need a microscope to see them or they might be obvious to the unaided eye. there are surfaces separating it into different phases. a mixture is the same everywhere. it is uniform. there are no surfaces separating it into different phases. if different kinds of atoms (different elements) are bonded together by their electrons, it is called a there are physical means of to isolate the different pure substances in a mixture and there are chemical means of to isolate the different elements in a compound. 1. element 2. compound 3. mixture 4. heterogeneous 5. homogeneous 6. pure substance 7. atoms 8. separation 9. viscosity 10. resistance