Chemistry for Today: General, Organic, and Biochemistry
9th Edition
ISBN: 9781305960060
Author: Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Publisher: Cengage Learning
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Question
Chapter 20, Problem 20.18E
Interpretation Introduction
Interpretation:
The meaning of the equation
Concept introduction:
Enzymes are biological catalysts. They break large complex molecules into small molecules and speed up the
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For which of these reactions will the difference between AH° and AE° be the greatest?
Multiple Choice
O NO(g) + O3(g) → NO2(9) + O2(9)
2H202(0) → 2H2O(0) + O2(g)
) CaCO3(s) → CaO(s) +CO2(g)
2C2H6(g) + 702(g) → 4CO2(g) + 6H2O()
4NH3(g) + 502(g) → 4NO(g) – 6H20(g)
Consider the following reaction:
CH 4(g) +2 Cl 2(g) <—> CCl 4(l) +H 2(g)
The Delta G^o for this reaction is -14.52kJ / (mol) . What is the value of the equilibrium constant (K eq ) for this reaction at 25°C?
Consider the decomposition reaction shown below.NO2(g) ⇄ NO(g) + ½ O2(g)
Chapter 20 Solutions
Chemistry for Today: General, Organic, and Biochemistry
Ch. 20 - What is the role of enzymes in the body?Ch. 20 - List two ways that enzyme catalysis of a reaction...Ch. 20 - What is the relationship between an enzyme and the...Ch. 20 - Why are so many different enzymes needed?Ch. 20 - Define what is meant by the term enzyme...Ch. 20 - Prob. 20.6ECh. 20 - Prob. 20.7ECh. 20 - Prob. 20.8ECh. 20 - What is the relationship between urea and urease?...Ch. 20 - Match the following enzymes and substrates: Enzyme...
Ch. 20 - Match the following general enzyme names and...Ch. 20 - Prob. 20.12ECh. 20 - Some enzymes consist of protein plus another...Ch. 20 - Prob. 20.14ECh. 20 - Prob. 20.15ECh. 20 - Prob. 20.16ECh. 20 - Prob. 20.17ECh. 20 - Prob. 20.18ECh. 20 - Prob. 20.19ECh. 20 - How is enzyme specificity explained by the...Ch. 20 - Prob. 20.21ECh. 20 - Prob. 20.22ECh. 20 - Prob. 20.23ECh. 20 - What observations may be used in experiments to...Ch. 20 - Prob. 20.25ECh. 20 - Prob. 20.26ECh. 20 - Prob. 20.27ECh. 20 - Write a single sentence to summarize the...Ch. 20 - Prob. 20.29ECh. 20 - Prob. 20.30ECh. 20 - Prob. 20.31ECh. 20 - When handling or storing solutions of enzymes, the...Ch. 20 - Prob. 20.33ECh. 20 - Prob. 20.34ECh. 20 - Prob. 20.35ECh. 20 - List an antidote for each of the two poisons in...Ch. 20 - Prob. 20.37ECh. 20 - Prob. 20.38ECh. 20 - Describe the importance of zymogens in the body....Ch. 20 - Prob. 20.40ECh. 20 - Prob. 20.41ECh. 20 - Name and contrast the two types of modulators.Ch. 20 - Prob. 20.43ECh. 20 - Prob. 20.44ECh. 20 - Prob. 20.45ECh. 20 - Prob. 20.46ECh. 20 - Prob. 20.47ECh. 20 - Prob. 20.48ECh. 20 - Prob. 20.49ECh. 20 - Prob. 20.50ECh. 20 - Prob. 20.51ECh. 20 - Prob. 20.52ECh. 20 - Prob. 20.53ECh. 20 - Prob. 20.54ECh. 20 - Explain how the pasteurization of milk utilizes...Ch. 20 - Prob. 20.56ECh. 20 - Prob. 20.57ECh. 20 - Prob. 20.58ECh. 20 - Prob. 20.59ECh. 20 - Why are enzymes that are used for laboratory or...Ch. 20 - Describe the difference between graphs showing...Ch. 20 - Answer the question associated with Figure 20.3....Ch. 20 - Prob. 20.63ECh. 20 - Prob. 20.64ECh. 20 - Prob. 20.65ECh. 20 - Prob. 20.66ECh. 20 - Prob. 20.67ECh. 20 - Which of the following is not a characteristic of...Ch. 20 - The human body has an average pH of about 7 and a...Ch. 20 - Look at Table 20.4 and identify the proteolytic...Ch. 20 - Saliva contains mucus, water, and _______, which...Ch. 20 - Most human enzymes function best in the...Ch. 20 - The site on an enzyme molecule that does the...Ch. 20 - The process by which an enzyme acts on the...Ch. 20 - In the multienzyme sequence shown below, molecules...
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Similar questions
- Determine whether the reactions listed below are entropy-favored or disfavored under standard conditions. Predict how an increase in temperature will affect the value of rG. (a) N2(g) + 2 O2(g) 2 NO2(g) (b) 2 C(s) + O2(g) 2 CO(g) (c) CaO(s) + CO2(g) CaCO3(s) (d) 2 NaCl(s) 2 Na(s) + Cl2(g)arrow_forwardAdenosine triphosphate, ATP, is used as a free-energy source by biological cells. (See the essay on page 624.) ATP hydrolyzes in the presence of enzymes to give ADP: ATP(aq)+H2O(l)ADP(aq)+H2PO4(aq);G=30.5kJ/molat25C Consider a hypothetical biochemical reaction of molecule A to give molecule B: A(aq)B(aq);G=+15.0kJ/molat25C Calculate the ratio [B]/[A] at 25C at equilibrium. Now consider this reaction coupled to the reaction for the hydrolysis of ATP: A(aq)+ATP(aq)+H2O(l)B(aq)+ADP(aq)+H2PO4(aq) If a cell maintains a high ratio of ATP to ADP and H2PO4 by continuously making ATP, the conversion of A to B can be made highly spontaneous. A characteristic value of this ratio is [ATP][ADP][H2PO4]=500 Calculate the ratio [B][A] in this case and compare it with the uncoupled reaction. Compared with the uncoupled reaction, how much larger is this ratio when coupled to the hydrolysis of ATP?arrow_forwardFor a chemical reaction, Keg at 373 K is 94.7. Calculate AG°373 (in kJ). O - 14.1 O + 6.13 - 294 + 14.1 O- 6.13arrow_forward
- For which of these reactions will the difference between AH° and AE° be the smallest? X 5 H₂(g) + Cl₂(g) → 2HCl(g) C4PH3(g) → P4(9) + 6H₂(9) ⒸP4(s) + 10Cl₂(g) → 4PC15(s) CO₂(g) + 2H₂O(1) CH4(9) + 20₂(9) ON₂(g) + 3H₂(g) → 2NH3(9) -arrow_forwardPredict the signs of Delta H for the reaction below: 4NO(g) + 6H,0(g) --> 4 NH,(g) + 50,g) AH > 0 Endothermic O AH > 0 Exothermic O AH > 0 Exothermic O AH < 0 Endothermicarrow_forwardCalculate the ΔG° rxn using the following information. 2 HNO 3( aq) + NO( g) → 3 NO 2( g) + H 2O( l) ΔG° rxn = ? ΔG° f (kJ/mol) -110.9 87.6 51.3 -237.1 -51.0 kJ -54.5 kJ +51.0 kJ -171.1 kJ -162.5 kJarrow_forward
- Use the information below to calculate ΔG°298 for the following reaction: NO (g) + O (g) ⇌ NO2 (g) ΔG°298 = ? 2 O3 (g) ⇌ 3 O2 (g) ΔG°298 = +489.6 kJ O2 (g) ⇌ 2 O (g) ΔG°298 =+463.4kJ NO (g) + O3 (g) ⇌ NO2 (g) + O2 (g) ΔG°298 = -199.5 kJ What does the value you calculated for ΔG°298 in Question 1 tell you about the reaction NO (g) + O (g) ⇌ NO2 (g) at this temperature?arrow_forwardThe following reaction has a value of AH° that would properly be labelled as AH°. 2Mg(s) + 02(g) –→ 2M9O(s) True Falsearrow_forwardCharacterize each of the following as product- or reactant-favored at equilibrium. CO + 1/2O2 = CO2 kp= 1.2 x 10^45arrow_forward
- Describe two ways to increase the rate of the following reaction, other than increasing the temperature or adding a catalyst: AgNO3(aq)+NaCl(aq)→AgCl(s)+NaNO3(aq)Explain your answer in terms of how the change will speed up the reaction.arrow_forwardHydrogen chloride is formed by the reaction of hydrogen and chlorine gases. For the reaction at 25°C, Kc = 2.6 x 1033 and ΔHrxn -44 kcal/mol. How will the equilibrium shift when the hydrogen chloride concentration is increased? A) It will shift in the reverse direction and be product-favored until equilibrium is re-established. B) It will shift in the reverse direction and be reactant-favored until equilibrium is re-established. C) The direction of the reaction shift depends on whether or not there is a temperature change. D) It cannot be determined from the information provided.arrow_forwardGiven the following information below, determine AGrxn at equilibrium. H2(g) + 12(g) = 2 HI(g) K, = 2.4x1030 (at 298 K) O +173 kJ O -173 kJ O 1arrow_forward
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