A chlorine (Cl) atom is adsorbed on a small patch of surface (see sketch at right). This patch is known to contain 16 possible adsorption sites. The Cl atom has enough energy to move from site to site, so it could be on any one of them. Suppose a Br atom also becomes adsorbed onto the surface. Calculate the change in entropy. Round your answer to 2 significant digits, and be sure it has the correct unit symbol. One way a Cl atom might be adsorbed on a 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?

A student dissolves 10.3g of ammonium nitrate NH4NO3 in 300.g of water in a well-insulated open cup. He then observes the temperature of the water fall from 22.0°C to 19.3°C over the course of 3.1 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: NH4NO3s -> NH+4aq + NO−3aq You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to the correct number of significant digits. Is this reaction exothermic, endothermic, or neither? If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. Calculate the reaction enthalpy ΔHrxn per mole of NH4NO3.

JLK/m 23. Nitric oxide reacts with chlorine to form NOCI. 1. 2NO(g) + Cl2(g) → 2NOCI(g) Substance: NO(g) Cl2(g) AH° (kJ/mol) 0 90.29 at 298 K AG° (kJ/mol) 86.60 0 at 298 K S°(J/K • mol) 210.65 223.0 at 298 K What is AG°xn for this reaction at 550. K? A. -143.76 kJ/mol B. -78.78 kJ/mol C.-22.24 kJ/mol D.-10.6 kJ/mol E. 66600 kJ/mol NOCI(g) 51.71 66.07 261.60

Sign in Week 15 Recitation Caleb Young Oklahoma - CHEM 1315 (Section 001) - Fall20 - ROCHER > Activities and Due Dates > Week 15 Recitation O Assignment Score: 50% Resources O Hint Check Answer Question 9 of 10 > When methanol, CH, OH, is burned in the presence of oxygen gas, O,, a large amount of heat energy is released. For this 2: reason, it is often used as a fuel in high performance racing cars. The combustion of methanol has the balanced, thermochemical equation CH,OH(g) + 0,(g) → CO,(g) + 2H,O(1) AH = –764 kJ How much methanol, in grams, must be burned to produce 629 kJ of heat? 26.33 mass: TOOLS x10 about us careers privacy policy terms of use contact us help 5:14 PM 12/11/2020 50

12:27 12-2 Analyzing Data... NAME Energy (kJ) NAME 1000 Many chemical reactions involve a change in energy. When the energy of the reactants is greater than the energy of the products, the reaction gives off heat and is exothermic. When the energy of the products is greater than that of the reactants, the reaction must absorb energy from the surroundings to occur and is endothermic. If the intermediate stage (the activated complex) is of a higher energy, then the reaction can only take place if the reactants are given an initial energy input (the activation energy). The graph shows energy diagrams that indicate how the energy changes as three reactions occur. Energy Changes for Three Reactions 800 600 Dashboard 400 200 DATE 0 ANALYZING DATA Interpret Energy Diagrams CLASS Direction of reaction 000 000 Calendar DATE .5GE 14 A D Copyright © Savvas Learning Company LLC. All Rights Reserved. Savvas is not responsible for any modifications made by end users to the content posted in its…