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ASU CHM 116 - Test 1 Study Guide

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QUESTION 1QUESTION 2QUESTION 3QUESTION 4QUESTION 5QUESTION 6QUESTION 7QUESTION 8QUESTION 9QUESTION 10QUESTION 11QUESTION 12QUESTION 13QUESTION 14QUESTION 15QUESTION 16QUESTION 17QUESTION 18QUESTION 19QUESTION 20QUESTION 21QUESTION 22Q U E STI O N 11. Given the reactions and thermodynamic data below, calculate the standard ΔH of formation for C6H5OH in kcal/mol.Reaction #1: C6H5OH + 7O2 = 6CO2 + 3H2O; ΔH = 729.8 kcalReaction #2: C + O2 = CO2; ΔH = 94.4kcal;Reaction #3 2H2 + O2 = 2H2O; ΔH = 136.8 kcal.(Question taken from: Kaplan DAT 3rd edition, 2004)41.7-41.70-2472471 points Q U E S T I O N 21. What is the value of ΔG (in kJ) at 25 C for the following reaction: Ca(s) + Cl2(g) = CaCl2(s). You will need to look up thermodynamic values, which can be found on the "Thermodynamic properties" handout or in the appendixof the text book.-795.8 kJ-748.1 kJ+763.7kJ+748.1kJ+795.8kJ1 points Q U E S T I O N 31. The complete combustion of n-butane is given by: C4H10(g) + 13/2O2(g) = 4CO2(g) + 5 H2O(g).The heat of this reaction is:(Question from "Cracking the MCAT, 2010-2011 edition" by The Princeton Review) You will need to look up the enthalpy of formation values for these compounds.-509.15 kilojoules-2657 kilojoules+509.15 kilojoules+2657 kilojoules1 points Q U E S T I O N 41. The "chlorine" used to chlorinate most swimming pools is actually sodium hypochlorite. Assume that the sodium hypochlorite degrades with a half-life of 6.00 days in the pool. If 400 grams of sodium hypochlorite is add to the pool at one point in time (not the time-release tablets), then how much will remain after 10.0 days? Give tha answer in grams.1 points Q U E S T I O N 51. Suppose that your morning shower is 7 minutes long and uses 4 gallons of water per minute that is a nice 102 F in temperature. How much energy (kJ) must be used to heat the water for your shower if the water coming into your house is at 60 F? The heat capacity of water is 4.18 J/g ·K and the density of water is 1 g/cm 3. The units are kJ.1 points Q U E S T I O N 61. The kinetics of the reaction below were studied and it was determined that the reaction rate increased by a factor of 9 when the concentration of B was tripled. The reactionis __________ order in B. Reaction: A + B = productsone-halfsecondfirstzerothird1 points Q U E S T I O N 71. Suppose a reaction has a rate constant of 0.520 1/h at 25.0 C. This reaction also has an activation energy of 50.0 kJ/mol. What is the rate constant of the reaction at 10.0 C (in 1/h)?1 points Q U E S T I O N 81. Calculate the change in free energy when you drop 7.30 g of potassium metal into a beaker containing excess water so that KOH(aq) and H2 gas are formed? The delta-G values you need are in your textbook. The units are kJ.1 points Q U E S T I O N 91. The explosive decomposition of NI3 forms N2 and I2. If the formation rateof I2 is 10.0 mol/ms, then what is the consumption rate of NI3 in the same time period? The units are mol/ms.1 points Q U E S T I O N 1 01. State functions are often not intuitive. Often students just memorize what parameters are state functions are which parameters are not. However,the basic concept is an important one that can be applied to other parameters in your everyday life. Suppose you took a trip to Las Vegas. Which of the following parameters of your trip are state functions? You may select more than one answer.The amount of time you spend in Las Vegas.The time it took you to get to Las Vegas.Your elevation in Las Vegas.The amount of fuel burned getting to Las Vegas.Your position as measured by latitude andlongitude.1 points Q U E S T I O N 1 11. What is the best and most complete definition of energy? Energy is the capacity to do work or transfer heat.Energy is the movement of electrons.Energy is a force that can be applied to an object.Energy is the property of objects that are in motion.1 points Q U E S T I O N 1 21. How much energy will it take to vaporize 45 g of liquid bromine (Br 2) if the ΔH of formation of Br 2 (g) is 31 kJ/mole?17.4 kJ8.7 kJ-8.7 kJ-17.4 kJ1 points Q U E S T I O N 1 31. The rate of the reaction 2NO(g) + O2(g) = 2NO2(g) is given by: (Question from "Cracking the MCAT, 2010-2011 edition" by The Princeton Review)Δ[NO2]/2ΔtΔ[N2]/ΔtΔ[NO]/2ΔtΔ[O2]/Δt1 points Q U E S T I O N 1 41. Given:Equation #1: Cu(s) + Cl2(g) = CuCl2(s); ΔH = -206 kJEquation #2: 2Cu(s) + Cl2(g) = 2CuCl(s); ΔH = -136 kJWhat is the ΔH for: CuCl2(s) + Cu(s) = 2CuCl(s)? Enter a numerical value below and be sure to include a minus sign if needed. The error interval is +/- 5 kJ. The units are kJ.1 points Q U E S T I O N 1 51. Which of the following reactions are expected to cause an increase in entropy? The equations may not be balanced or even complete, so complete the reaction and then answer the question. You may select multiple reactions.NH4NO3(s) = N2O(g) + 2H2O(l)C6H6(l) + O2(g) = CO2(g) + H2O(g)PCl5(s) = PCl3(l) + Cl2(g)Any downward phase change (e.g. a gas changing to a liquid)Lead (II) nitrate(aq) + sodium carbonate (aq) = ???Al(s) + O2(g) = Al2O3(s)1 points Q U E S T I O N 1 61. For the species in the reaction below, ΔH°f is zero for ________.2Co(s) + H2(g) + 8PF3(g) = 2HCo(PF3)4(l)both Co(s) and H2(g)Co(s)PF3(g)2HCo(PF3)4(l)H2(g)1 points Q U E S T I O N 1 71. Which of the following reactions is NOT spontaneous at standard state?All the reactions listed above are spontaneous at standard state.Carbon (graphite) + O2(g) = CO2(g)Any reaction with a negative ΔG value for the reaction.Ca(s) + H2O(l) = Ca(OH)2(aq) + ½H2(g)2Al(s) + 3/2O2(g) = Al2O3(s)1 points Q U E S T I O N 1 81. Which of the following processes is the closest to being reversible?Dissolving metal in nitric acid and then reforming the metal through electroplating.Recharging a 12 V battery with a 12.6 V DC power supply.The dissolution of (NH4)(NO3) salt into water.The equilibrium between the protonated and ionized form of a weak acid in solution.The reaction between nitric acid and sodium hydroxide.1 points Q U E S T I O N 1 91. Which of the following statements is NOT true?The entropy of a gas is higher than that of a solid form of the same chemical.Spontaneous reactions in one direction are not spontaneous in the reverse direction.Increasing molecular motion increases entropy.Spontaneous reactions are fast processes.1 points Q U E S T I O N 2 01. Which of the statements about catalysts is/are NOT correct? Select all


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