Concept explainers
The following reactions are proposed. Make a rough estimate of the rate of each one
a.
b.
c.
d.
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Chemistry for Today: General, Organic, and Biochemistry
- 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_forwardClassify each of the reactions according to one of the four reaction types summarized in Table 18.1. (a) C6H12O6(s) + 6 O2(g) 6 CO2(g) + 6 H2O() rH = 673 kj/mol-rxn rS = 60.4 j/K mol-rxn (b) MgO(s) + C(graphite) Mg(s) + CO(g) rH = 490.7 kJ/mol-rxn rS = 197.9 J/K mol-rxn TABLE 18.1 Predicting Whether a Reaction Will Be Spontaneous Under Standard Conditionsarrow_forwardClassify each of the following reactions as (1) a redox reaction (2) a nonredox reaction or (3) cant classify because of insufficient information. a. A combination reaction in which one reactant is an element b. A decomposition reaction in which the products are all elements c. A decomposition reaction in which one of the products is an element d. A displacement reaction in which both of the reactants are compoundsarrow_forward
- Indicate to which of the following types of reactions each of the statements listed applies: combination, decomposition, displacement, exchange, and combustion. More than one answer is possible for a given statement. a. An element may be a reactant. b. An element may be a product. c. A compound may be a reactant. d. A compound may be a product.arrow_forwardFor each of the changes listed will the rate of the following chemical reaction increase, decrease, or remain the same? Cu(s)+H2SO4(aq)CuSO4(aq)+H2(g) a. the concentration of H2SO4 is increased b. the copper is ground into a powder c. the mixture is stirred rapidly d. the temperature of the solution is increasedarrow_forwardClassify each of the reactions according to one of the four reaction types summarized in Table 18.1. (a) Fe2O3(s) + 2 Al(s) 2 Fe(s) + Al2O3(s) rH = 851.5 kj/mol-rxn rS = 375.2 J/K mol-rxn (b) N2(g) + 2 O2(g) 2 NO2(g) rH = 66.2 kJ/mol-rxn rS = 121.6 J/K mol-rxn TABLE 18.1 Predicting Whether a Reaction Will Be Spontaneous Under Standard Conditionsarrow_forward
- . A(n) _______ speeds up a reaction without being consumed.arrow_forwardThe characteristics of four reactions, each of which involves only two reactants, are given. For each of the following pairs of the preceding reactions, compare the reaction rates when the two reactants are first mixed by indicating which reaction is faster. a. 1 and 2 b. 1 and 3 c. 1 and 4 d. 2 and 3arrow_forwardMuch of todays plumbing in newly built homes is made from a plastic called poly vinyl chloride, or PVC. Using Table 12.3, write a reaction for the formation of poly vinyl chloride.arrow_forward
- Indicate to which of the following types of reactions each of the statements listed applies: combination, decomposition, displacement, exchange, and combustion. More than one answer is possible for a given statement. a. Two reactants are required. b. Only one reactant is present. c. Two products are present. d. Only one product is present.arrow_forward3 Magnesium metal reacts rapidly with hydrochloric acid in an open container, producing aqueous magnesium chloride and hydrogen gas. Which of the following would be most useful in measuring the rate of this reaction? a. the mass of the beaker and its contents b. the volume of the solution c. the concentration of the chloride ion d. the colour of gas producedarrow_forwardIn the laboratory, hydrogen gas of good purity can most easily be obtained by the reaction of a strong acid, like sulfuric acid, on a reactive metal, such as zinc: Zn(s)+H,SO,(aq) ZnSO, (aq)+H,(g) 4 4 2. Suppose an engineer decides to study the rate of this reaction. He prepares four reaction vessels by adding 171.5 g of solid zinc and 77. mL of 5.0 M sulfuric acid solution to each, and then filling the remainder of the vessel with distilled water. The volume and temperature of each vessel is shown in the table below. Arrange the reaction vessels in decreasing order of initial rate of reaction. In other words, select a "1" next to the vessel in which the engineer can reasonably expect the initial rate of reaction to be highest, a "2" next to the vessel in which the initial rate of reaction would be next highest, and so on. initial rate of vessel volume temperature reaction A 3.0 L - 5.0 °C ? В 3.0 L -4.0 °C ? C 2.0 L -4.0 °C D 5.0 L - 5.0 °C ? > > >arrow_forward
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