A chlorine (CI) and bromine (Br) atom are adsorbed on a small patch of surface (see sketch at right). This patch is known to contain 81 possible adsorption sites. The Cl and bromine (Br) atoms have enough energy to move from site to site, so they could be on any two of them. Suppose the Br atom desorbs from the surface and drifts away. Calculate the change in entropy. Round your answer to 2 significant digits, and be sure it has the correct unit symbol. 0 0.0 H 0,0 5 One way a Cl and might be adsorbec surface with 16 sit

A chlorine (CI) and bromine (Br) atom are adsorbed on a small patch of surface (see sketch at right). This patch is known to contain 81 possible adsorption sites. The Cl and bromine (Br) atoms have enough energy to move from site to site, so they could be on any two of them. Suppose the Br atom desorbs from the surface and drifts away. Calculate the change in entropy. Round your answer to 2 significant digits, and be sure it has the correct unit symbol. 0 0.0 H 0,0 5 One way a Cl and might be adsorbec surface with 16 sit

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter11: Chemical Kinetics: Rates Of Reactions

Section: Chapter Questions

Problem 87QRT

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An oxygen (0,) molecule is adsorbed on a patch of surface (see sketch at right). This patch is known to contain 529 adsorption sites. The (0,) molecule has enough energy to move from site to site, so it could be on any one of them. Suppose part of the surface becomes inaccessible, so that only 196 adsorption sites are now available for the molecule. Calculate the change in entropy. One way an O, molecule could Round your answer to 3 significant digits, and be sure it has the correct unit symbol. be adsorbed on a patch of surface with 16 sites.
The following are Biophysical Chemistry Questions: When we are determining the equilibrium affinity (K) for a binding reaction or the rate constant (k) for a reaction, why do we make multiple measurements? Why is it useful to put one (or more) reagents in great excess of the other (for equilibrium analysis or kinetic analysis?) Why do you start learning about heat and work in thermodynamics witht the ideal gases instead of chemical reactions?
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The following data were obtained for the adsorption of a certain material (ORA) on activated carbon at 25 °C. Sample number [ORA) initial (M) [ORA] at equilibrium Activated carbon mass (M) (g) 1.0119 0.0096 0.0044 1 2 1.0186 1.0360 0.0289 0.0578 0.0207 3 0.0446 4 1.0129 0.0867 0.0721 1.0393 1.0312 0.1002 0.1270 0.1742 0.1156 6. 0.1445 7 1.0198 0.1926 8 1.0270 1.0252 0.2407 0.2227 0.2889 0.1108 4. If a monolayer of N2 molecules is 0.03075 mole per one gram of activated carbon, and the surface area on one N2 molecules is 0.162 nm2, determine: a. surface area per one gram of activated carbon b. surface area of one ORA molecule
The following data were obtained for the adsorption of a certain material (ORA) on activated carbon at 25 °C. Activated carbon mass (g) 1.0119 [ORA) initial (M) [ORA] at equilibrium (М) Sample number 1 0.0096 0.0044 1.0186 0.0289 0.0207 3 1.0360 0.0578 0.0446 4 1.0129 0.0867 0.0721 5 1.0393 0.1156 0.1002 6. 1.0312 0.1445 0.1270 7 1.0198 0.1926 0.1742 0.2227 1.0270 0.2407 1.0252 0.2889 0.1108 1. Try fitting these data using Langmuir Isotherm and obtain K and monolayer of ORA molecules per one gram 2. Try fitting these data using Freundlich Isotherm and obtain its constants 3. Which isotherm describe best the adsorption of ORA on activated carbon and why? 4. If a monolayer of N2 molecules is 0.03075 mole per one gram of activated carbon, and the surface area on one N2 molecules is 0.162 nm, determine: a. surface area per one gram of activated carbon b. surface area of one ORA molecule
The following data were obtained for the adsorption of a certain material (ORA) on activated carbon at 25 °C. Sample Activated carbon mass [ORA) initial (M) (g) 1.0119 [ORA] at equilibrium (M) 0.0044 number 1 0.0096 1.0186 0.0289 0.0207 3 1.0360 0.0578 0.0446 1.0129 1.0393 4 0.0867 0.0721 5 0.1156 0.1002 0.1445 0.1926 6 1.0312 0.1270 1.0198 0.1742 8 1.0270 0.2407 0.2227 9. 1.0252 0.2889 0.1108 4. If a monolayer of N2 molecules is 0.03075 mole per one gram of activated carbon, and the surface area on one N2 molecules is 0.162 nm², determine: a. surface area per one gram of activated carbon b. surface area of one ORA molecule
An oxygen (O,) molecule is adsorbed on a patch of surface (see sketch at right). This patch is known to contain 784 adsorption sites. The (0,) molecule has enough energy to move from site to site, so it could be on any one of them. Suppose additional surface becomes exposed, so that 1089 adsorption sites are now available for the molecule. Calculate the change in entropy. One way an 0, molecule could be adsorbed on a patch of Round your answer to 3 significant digits, and be sure it has the correct unit symbol. surface with 16 sites. x10 ?
1. What is/are the applications of the following adsorption isotherm models and their limitations? a. Langmuir b. BET
In an experiment on the adsorption of oxygen on tungsten it was found that the same volume of oxygen was desorbed in 27 min at 1856 K and 2.0 min at 1978 K. What is the activation energy of desorption? How long would it take for the same amount to desorb at (i) 298 K, (ii) 3000 K?
The following data were obtained for the adsorption of a certain material (ORA) on activated carbon at 25 °C. Sample Activated carbon mass (g) 1.0119 [ORA) initial (M) [ORA] at equilibrium (М) 0.0044 number 0.0096 1.0186 1.0360 0.0289 0.0207 3 0.0578 0.0446 0.0721 0.1002 4 1.0129 0.0867 1.0393 0.1156 1.0312 1.0198 0.1445 0.1926 0.2407 0.2889 0.1270 7 1.0270 1.0252 0.1742 0.2227 0.1108 8 1. Try fitting these data using Langmuir Isotherm and obtain K and monolayer of ORA molecules per one gram 3. Which isotherm describe best the adsorption of ORA on activated carbon and why? 4. If a monolayer of N2 molecules is 0.03075 mole per one gram of activated carbon, and the surface area on one N2 molecules is 0.162 nm, determine: a. surface area per one gram of activated carbon b. surface area of one ORA molecule
Hydrogen iodide is very strongly adsorbed on gold but only slightly adsorbed on platinum. Assume the adsorption follows the Langmuir isother m and predict the order of the HI decomposition reaction on each of the two metal surfaces.
Consider a polymer formed by a chain process. By how much does the kinetic chain length change if the concentration of initiator is increased by a factor of 3.6 and the concentration of monomer is decreased by a factor of 4.2?

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