For the following two reactions
the first reaction has a lower value of
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Chapter 20 Solutions
Physical Chemistry
- The following equation represents a reversible decomposition: CaCO3(s)CaO(s)+CO2(g) Under what conditions will decomposition in a closed container proceed to completion so that no CaCO3 remains?arrow_forwardFor the following reaction C(s)+2H2(g)CH4(g) K=0.26 at 1000C (3 significant figures). What is the equilibrium constant at 750C (3 significant figures)?arrow_forwardSubstances that poison a catalyst pose a major concern for many engineering designs, including those for catalytic converters. One design option is to add materials that react with potential poisons before they reach the catalyst. Among the commonly encountered catalyst poisons are silicon and phosphorus, which typically form phosphate or silicate ions in the oxidizing environment of an engine. Group 2 elements are added to the catalyst to react with these contaminants before they reach the working portion of the catalytic converter. If estimates show that a catalytic converter will be exposed to 625 g of silicon during its lifetime, what mass of beryllium would need to be included in the design?arrow_forward
- Determine rxnH 25 C for the following reaction: NO g O2 g NO2 g This reaction is a major participant in the formation of smog.arrow_forwardnitrogen monoxide reacts with oxygen to give a brown gas NO2 according to the reaction 2NO+O2>2NO2 H=-114 is the reaction endotsrmic or exothermicarrow_forwardFor the reaction: 2SO2(g) + O2 (g) ⇄ 2SO3(g), ∆H = 102.4kJ. Indicate how each of the listed stressors willaffect the item listed in the column header.arrow_forward
- Burning methane with oxygen is a highly exothermic reaction. Yet a mixture of methane and oxygen can be kept indefinitely without any reaction occurring. How is this possible?arrow_forwardI was told to repost this question, because I got the explanations for a-c. I just need d explained. 7. Sulfuryl chloride, SO2Cl2, is a highly reactive gaseous compound. When heated, it decomposes as follows: SO2Cl2 (g) ⇌ SO2 (g) + Cl2 (g). This decomposition is endothermic. A sample of 3.509 grams of SO2Cl2 is placed in an evacuated 1.00-L bulb and the temperature is raised to 375 K. a. What would be the pressure (in atm) in the bulb if no dissociation of the SO2Cl2(g) occurred? b. When the system has come to equilibrium at 375 K, the total pressure in the bulb is found to be 1.43 atm. Calculate the partial pressures of SO2, Cl2, and SO2Cl2 at equilibrium. c. Give the expression for the equilibrium constant (either Kp or KC) for the decomposition of SO2Cl2(g) at 375 K. Calculate the value of the equilibrium constant you have selected. d. If the temperature were raised to 500 K, what effect would this have on the equilibrium constant? Explain in 1-2 sentences.arrow_forwardIn order for Cl and NOCl to react and produce NO and Cl2 which of the following have to be true? a) NOCl must undergo a unimolecular rearrangement b) they must collide with sufficient energy to break or weaken some of the bonds present in the reactants c) they must collide with the proper orientation to facilitate the formation of new bonds present in the products d) b & c e) a, b & carrow_forward
- The value of ΔG° at 25°C for the decomposition of gaseous sulfur trioxide to solid elemental sulfur and gaseous oxygen, 2SO3 (g) → 2S (s, rhombic) + 3O2 (g) is __________ kJ/mol. A) +740.8 B) -370.4 C) +370.4 D) -740.8 E) +185.2arrow_forwardFor the reaction: A(g)+1/2B(g)→2C(g). A) When C is increasing at a rate of 3.5×10−2 mol L−1 s−1 , how fast is B decreasing? Express your answer using two significant figures. B) How fast is A decreasing? Express your answer using two significant figures.arrow_forwardThe following reversible enzymatic reaction occurs in many areas of the body, but especially in red blood cells. The conversion of water and carbon dioxide into bicarbonate and hydrogen ions occurs through the action of an enzyme called carbonic anhydrase. Use the Law of Mass Action to predict which direction this equation will go under different circumstances. CO2 + H2O ↔ H+ + HCO3- Hyperventilating would increase the loss of carbon dioxide (CO2) from the blood. In what direction would the reaction above go in order to restore equilibrium? Left or right?arrow_forward
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