No one really knows what atoms and molecules look like, but water is considered
ID: 1874881 • Letter: N
Question
No one really knows what atoms and molecules look like, but water is considered to be a liquid form of H,O molecules that stick together. HO molecules are thought to consist of two hydrogen atoms bonded to a larger oxygen atom. One model that is often used to represent this molecule is shown in the diagram below. represents an oxygen atonm represents a hydrogen atom represents an H,O molecule in which O two H atoms are bonded to an O atom Suppose a tiny container with some water in the bottom of it and air above it is closed so no molecules or atoms can pass in or out of it.In the diagram below the water molecules (but not the air molecules) are depicted on the left. (They should actually be pictured as much smaller relative to the container, but then you couldn't see them.) What do you think will happen if the water is heated above the boiling point of water? (a) What do you expect to happen to the pressure in the container? (b) Which of the diagrams below are compatible with the assumptions of the kinetic theory of gases? i.e., according to kinetic theory what will happen to the average kinetic energy of the molecules as the temperature and pressure goes up? (Hint: is possible that more than one of the diagrams is compatible.) molecules molecules molecules molecules have original liquid phase no come change apart and the atoms have moved up have have spread out expanded hae spread out (c) Which diagram do you think best represents the actual situation? Why?Explanation / Answer
a. when water is heated above boiling point of water, the molecules of weater break away from the liquid phase and start accumulating at the top of the container in gaseous phase, there by increasing the pressure in the container
b. from kinetic theorey of gases, the mean free path should increase for increase in temperature, hence diagram 1 is consistent with kinetic theorey of gases
c. diagram A represents the best situation as path length increases in increase in temperature and thats what we see in this diagram and hence it represents more closely the actual situation among the given options
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.