Lab 4 Worksheet_ Stroop Effect

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What is the difference between reversible reaction and irreversible reaction?

Enzymes and substrates have what is known as the lock-and-key mechanism. How so?

Free Energy (kcal/mol) 25 20 15 10 5 0 A \ B A D Reaction progress Use the reaction energy diagram above to answer the following questions. Calculate the activation energy, AG ‡, for the step A to B. kcal/mol Calculate the overall energy change, AGº, for the process B to C. Which step is faster, (a) A to B or (b) C to D? kcal/mol

Free Energy (kcal/mol) 25 20 15 10 5 0 A \ B A Reaction progress Use the reaction energy diagram above to answer the following questions. Calculate the activation energy, AG ‡, for the step D to C. kcal/mol Calculate the overall energy change, AG°, for the process B to A. Which step is faster, (a) B to A or (b) C to D? kcal/mol

3. What is a "concerted mechanism"?

A catalyst: I) lowers activation energy II) uses an existing reaction pathway III) is not consumed in the reaction and therefore does not appear in the chemical equation of each mechanism IV) speeds up a reaction V) is homogeneous if it is in a different phase than the reactants       I, III, and IV   I, IV, and V   II, III, and IV   II and IV   I, II, IV, and V

h) H₂O, cat. H₂SO4

Use the data in the table below to answer the following questions. Reaction : 4.0 M Acetone (in mL) 1.0 M HCl (in mL) 0.005 M Iodine    (in mL) H2O        (in mL) Time - 1st Run Time - 2nd Run Avg. Rxn. Time Temp (°C) 1 8 8 8 26       23 2 4 8 8 30       23 3 8 4 8 30       23 4 8 8 4 30       23 Which two experiments should be compared to determine the exponent in the rate law for acetone?                                     Which two experiments should be compared to determine the exponent in the rate law for HCl?                                    Which two experiments should be compared to determine the exponent in the rate law for iodine?

True or false  1. the ΔE is a constant for the reaction 2. the ΔE determines the Keq 3. the rate is determined by the amount of energy in the transition state, designated by the star * 4. the activation energy is another name for the energy in the transition state

For the following reactions, tell whether these changes will cause a shift 15 to the right, a shift to the left or no change. _Co(g) + NO2(g) =CO2(g) + NO(g) AH = +48.5 kJ Left Right No Change increase volume decrease temperature decrease [CO2] add an inhibitor increase [NO2]

Give 1 example of a fruitful and unfruitful collision in your daily activities.

Enzymes take part in nearly all metabolic reactions. What is an enzyme's impact on the activation energy of a chemical reaction? There are two parts. How do enzymes affect the activation energy of a reaction? Label the reaction energy diagram with the appropriate terms. Effect of enzymes Answer Bank activation energy with enzyme activation energy without enzyme Course of reaction Energy

CH3CHO + 2H+ + 2e¯ → C2H5OH, with ECH, CHO -0.19 v NAD+ + H+ + 2e¯ → NADH, with E ´NAD+ -0.32 v 1. If acetaldehyde (CH3CHO) and ethanol (C2H5OH) are mixed in the presence of NAD+ and NADH, a chemical reaction starts. Use the information above to determine the balanced chemical equation for the overall reaction that occurs spontaneously. Explain how you know that your reaction proceeds spontaneously in the direction indicated in your chemical equation. 2. In the liver, the enzyme called alcohol dehydrogenase catalyzes the conversion of ethanol to acetaldehyde. If the reaction is allowed to proceed until equilibrium is established, how would the reaction mixture respond to the addition of the enzyme? Explain your reasoning.

Consider this organic mechanism: X olo H-C1: G Click and drag to start drawing a structure. Ar 1 2 Does this mechanism describe an acid/base reaction? Note for advanced students: we mean only acid- base reactions in the Brønsted-Lowry sense. Yes! O Certainly not. OWho knows? We need more information to decide. Which reactants, if any, are acting as Brønsted- Lowry acids? 01 02 Which reactants, if any, are acting as Brønsted- Lowry bases? 01 02 If you said this mechanism does describe an acid-base reaction, draw the products of the reaction on the right-hand side above.

Temp mail Face emal Disp Temp mail - Fake e... If the temperature of a reaction is increased, how does the reaction rate change? O the reaction rate does not change O the reaction rate decreases ) the reaction rate increases O the reaction rate can increase or decrease

Explain why scientists do not use a standard set of steps for everyinvestigation they conduct.

1. Why should chemical reactions be represented? 2. Why does reaction rate matter in life? thank u!

How is this reaction sequence regulated? CO2(g) + H2O(l) ⟷ H2CO3(aq) H2CO3(aq) ⟷ H+1(aq) + HCO3-1(aq) Group of answer choices Breathing controls carbon dioxide concentration and carbonic anhydrase catalyzes the reaction to lower the activation energy.   Ingestion of nutrients controls carbon dioxide concentration and carbonic anhydrase catalyzes the reaction to lower the activation energy.   Breathing controls carbon dioxide concentration and carbonic anhydrase catalyzes the reaction to increase the activation energy.   Metabolism controls carbon dioxide concentration and carbonic anhydrase catalyzes the reaction to increase the activation energy.   Ingestion of nutrients controls carbon dioxide concentration and carbonic anhydrase catalyzes the reaction to increase the activation energy.

app.101edu.co Question 8 of 20 Which of the following statements is false about catalysts? A) Enzymes are biological catalysts. B)A catalyst is consumed in a chemical reaction. C)A catalyst increases reaction rate by providing an alternate reaction pathway with a lower activation energy. D) A catalyst may undergo change during a reaction but is unchanged at the end of a reaction. E) Catalysts may be homogeneous or heterogeneous. MacBooik Pro

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Free Energy (kcal/mol) 25 20 15 10 5 0 B M A A Reaction progress Use the reaction energy diagram above to answer the following questions. Calculate the activation energy, AG ‡, for the step B to A. kcal/mol Calculate the overall energy change, AGº, for the process A to D. Which step is faster, (a) B to C or (b) D to C? kcal/mol

Study the following reaction energy diagram: energy reactants products Then answer the following questions about the chemical reaction. O release Does this reaction release or absorb energy? O absorb O nelther How many transition states occur during this reaction? O yes Could this be an elementary reaction? O no If you sald this reaction could not be elementary, then how many steps are in Its mechanism? If you sald this reaction could not be elementary, then enter the number of the step in Its mechanism which Is rate- determining. For example, If the first step Is the rate- determining step, enter "1" here.