20. Mark and Elizabeth are combining two substances, X and Y, in chemistry class. Substance X is a solid and Substance Y is a liquid. investigating the rate of reaction between the two substances. In a reaction between Substances X and Y, which action would MC increase the reaction rate? using smaller sized particles of X O increasing the pressure on X and Y O lowering the temperature of Y O adding more of X and Y PREVIOUS 20 of 25 NEXT

20. Mark and Elizabeth are combining two substances, X and Y, in chemistry class. Substance X is a solid and Substance Y is a liquid. investigating the rate of reaction between the two substances. In a reaction between Substances X and Y, which action would MC increase the reaction rate? using smaller sized particles of X O increasing the pressure on X and Y O lowering the temperature of Y O adding more of X and Y PREVIOUS 20 of 25 NEXT

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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Question 18 For some medical procedures, doctors cool the patient's body before beginning. Following the procedure, doctors warm the patient back to normal temperature. Based on what you learned about reaction rates this unit, explain what purpose changing the temperature of the patient's body serves. Answer using 4 to 6 complete sentences. H Normal Enter your answer here 2 4 DOT BIU
TRUE OR FALSE 1. Increasing the temperature will increase the kinetic energy of particles, therefore increasing the collisions between particles. 2. Usually lowering the temperature will slow down a reaction. 3. Increasing the concentration of the reactants will slow down the reaction. 4. A catalyst increases the efficiency of collisions between reactants 5. You observe bubbles after adding metal to a solution. Do you assume a chemical reaction took place? YES OR NO?
Which one of the following reactions belongs to an exothermic reaction? A. The ionization of potassium atom B. The breaking of a C-C bond C. The condensation of water vapor D. The sublimation of sodium metal
Increasing the pressure on the following reaction will increase which of the chemicals present in the reaction? PCl5 (g) double arrows PCl3 (g) + Cl2 (g) PCl5 PCl3 Cl2 None of these
g) K2CO3 + HNO3 → Type of reaction h) BİCI3 + КОН Type of reaction NaC2H3O2 + COSO4 -> I) Type of reaction
7. The rate of the endothermic reaction, H2CO3(aq)→H2O(l)+CO2(g), using 1.00 M H2CO3, can be increased by adding more water to the reactant boiling the water doubling the quantity of 1.00 M H2CO3 a. I only b. II only c. III only d. II and III only
2. Which of the following is most similar to a system at equilibrium? * O a shift change at an assembly plant involving two crews of 100 employees O a popcorn maker when the popcorn starts to pop the water in a pool when swimmers start to splash water out of the pool a burning candle salt concentrations in the oceans
The reaction rate of a chemical reaction will increase as a result of changes made to the system, as long as those changes increase what factor? O Amount of empty space between reactants O Number of collisions between reactants O Electrical charge of the reactants O Atomic mass of the reactants
Answer the 1st question
If a chemical reaction is going to move forward, what part of the reaction must collide? A. reactants and products B. reactants with activated complex C. products only D. reactants only
Question 43 The following reaction is a reversible reaction. Which of the following statements best describes what it means for this reaction to be reversible? HCOOH+H,O - HCOO + HẠO* O a. This reaction only occurs in the reverse direction as written above. O b. All of the reactant molecules react to make product and then all of the product molecules react to make reactants again. c. Forward and reverse reactions proceed at the same rate. O d. Forward and reverse reactions occur simultaneously. Oe. The rate of the reverse reaction is must faster than the rate of the forward reaction.
Why does the rate of most reactions decrease over time? A. A decrease in reactant concentration reduces the frequency of successful collisions. B. A decrease in temperature reduces the average kinetic energy of the particles. C. An increase in product concentration interferes with the effectiveness of the catalyst. D. An increase in pressure of the system reduces the movement and energy of particles.