Corrected True/False: Indicate whether each statement is true or false by circling the word true or the word false. If false, correct the statement to make it true in the space provided. 10. A physical change usually involves a greater enthalpy change than does a chemical change. True / False 11. In endothermic reactions the products have more kinetic energy than the reactants. True / False 12. The process of nuclear decay is a third order reaction. True / False 13. The rate-determining step is the slowest step in a reaction mechanism. True / False

Corrected True/False: Indicate whether each statement is true or false by circling the word true or the word false. If false, correct the statement to make it true in the space provided. 10. A physical change usually involves a greater enthalpy change than does a chemical change. True / False 11. In endothermic reactions the products have more kinetic energy than the reactants. True / False 12. The process of nuclear decay is a third order reaction. True / False 13. The rate-determining step is the slowest step in a reaction mechanism. True / False

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Write true if the statement is true, otherwise change the underlined word to make the statement true. 1. Metal A has a higher specific heat than metal B. If the two metals are independently applied with equal heat, it is expected that metal A will have a higher change in temperature. 2. The units for the rate constant of an over-all 1st order reaction is s', when the reaction time is measured in seconds. 3. If K is much greater than 1 (that is, K>>1), the equilibrium will favor the formation of reactants. 4. In the iron-thiocyanate system, increasing the pH would produce a dark orange solution. 5. For a weak acid HA, the equilibrium concentration of H3O* is equal to [HA]i. 6. The buffer region is the pH range where a buffer effectively neutralizes added acids and bases, while maintaining a relatively constant pH. A buffer can be expressed by the Henderson-Hasselbaich equation. 7. 8. Diluting a concentrated weak base, results to an increase in pH. 9. The plot of absorbance versus…
kinetic data for the following reaction was determined experimentally; 2NO(g) + Chlg) - 2NOCI(g) Experiment number [Ch). M 0.20 [NO). Initial rate of reaction M 0.10 0.30 M/s 0.63 5.70 0.20 0.80 2 0.10 2.58 The orders of the reaction with respect to NO and Cly are respectively. and O two and one, respectively. O one and two, respectively. O three and one respectively. O one and three, respectively,
8. Smelling salt decomposes spontaneously at room temperature by the equation below. A student places a 10.00-g sample into a 1-liter sealed rigid vessel. What measurements should the student make to determine the rate of this reaction?(NH4)2CO3(s)→2NH3(g)+H2O(g)+CO2(g) a. change in mass and temperature b. temperature and time c. change in mass and time d. change in pressure and time
Use the information about the rate law to answer the questions below.
Pls help ASAP on all ASKED QUESTIONS PLS PLS
Please answer all parts.
17. A first order decomposition reaction was found to have an initial rate of 0.19 M-min- when the initial reactant concentration was 0.33 M. What is the initial rate of reaction if the initial concentration is increased to 0.45 M? D. 0.19 M·min E. 0.58 M·min- A. 0.26 M·min- B. 1.3 M-min¬1 C. 0.78 M·min-
= Using a rate law The rate of a certain reaction is given by the following rate law: rate = k[H₂ ] [NH₂] Use this information to answer the questions below. What is the reaction order in H₂? What is the reaction order in NH3? What is overall reaction order? At a certain concentration of H₂ and NH3, the initial rate of reaction is 17.0 M/s. What would the initial rate of the reaction be if the concentration of H₂ were doubled? Be sure your answer has the correct number of significant digits. The rate of the reaction is measured to be 2.0 x 10³ M/s when [H₂] = 0.75 M and [NH₂] = 0.44 M. Calculate the value of the rate constant. Be sure your answer has the correct number of significant digits. k= 0 0 04/ -1 X 1/5
Radioactive decay of 212Bi is observed to be a first-order process with a half-life (t½) of 4.00 days. It is noted that a 1.70 g sample of 212Bi decays over 12 days to leave only 0.213 g behind. What is the rate constant (k) for this process? a. 12.0 day–1 b. 0.250 day–1 c. 0.173 day–1 d. 5.77 day–1 e. none of these
For reactions that follow either first order or second order rate laws, the slope of the linear fit can be used to determine none of these the final concentration of products the rate law constant the initial concentration of the reactants
39. The decomposition of a certain pesticide was found to follow first-order kinetics. A student finds that after 3.0 months a sample of pesticide was 87.5% decomposed (only 12.5% of the pesticide remained). What is the half-life (112) for the decomposition reaction? a. 1.0 months b. 2.0 months 3.0 months d. The half-life can not be determined with the information provided.
The radioactive isotope 99mTc (used in medical stress tests) decays via gamma emission following first order kinetics and has a half-life of 6.02 hours. How long will it take before the radioactivity drops below 5.00% of the initial value? A. 42.1 hours B. 30.2 hours C. 26.1 hours D. 24.1 hours