The langmuir modelconsider a vapor of atom in equilibrium with atoms adsorbed to a surface. as atoms from a vapor phasebecome bound to a surface, they are restricted to discrete sites and are not free to move. each of the sitesoccupies an area a1 for a total of ns = a/a1 possible binding sites. only one atom can occupy each site. the binding energy for an atom on the surface is −ε0 . the mass of the atoms is m and both the surface andvapor are held at temperature τ.a) find the partition for the system of adsorbed atoms as a function of the number of adsorbed atoms z(nad ).b) calculate the chemical potential of the adsorbed atoms. c) use your expression for the chemical potential to find the equillibrium presure of the vapor as a functionof the number of adsorbed atoms nad /ns .

Achemical reaction (also known as a chemical change) produces substances that are chemically different from the starting materials. an example of a chemical reaction is the formation of water from hydrogen and oxygen gas.in a physical change, a substance changes its physical appearance but not its chemical identity. an example of physical change is the formation of liquid water from solid water, a familiar process called melting. physically, liquid water looks very different from solid water (ice) but the chemical identity, water, is the same for both. which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? oxygen gas changes to ozone during thunderstorms carbon dioxide is produced by the combustion of gasoline in an automobile engine. when coal, oil, and natural gas are decomposed in landsills they produce methane gas. freezing rain develops when a warm air mass overrides a cold air mass. fog forms from water vapor when the temperature drops below the dew point

Why do you suppose the structural polysaccharide cellulose does not contain branches? why do you suppose the structural polysaccharide cellulose does not contain branches? branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby decreasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby increasing the rigidity and strength of the microfibrils. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby increasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby decreasing the rigidity and strength of the microfibrils.

Can someone me with these questions plz.