Multiple Choice1. When a match is lit, the air around the flame feels hot to the hand. Which statement best describesthis observation?Heat is absorbed from the system, so it feels hotter.b. The reaction is endothermic.а.The potential energy of the match decreased.d. 3P6) + 10KCIO3 (5) →ЗРо + 10KCIO; (9) —с.3P,O10 (9) + 10KCI + 9484 kJ3P,O10 (6) AH = 3161 kJ/mol Pе.(s)To answer questions 2 & 3, refer to the following information:A. synthesis reactionB. boiling a liquidC. subliming a solidD. dissolving a soluteE. nuclear fission2. Which of the following is always an example of an exothermic reaction?а.Ad. Db.е. Ес. С3. Which of the following would most likely have the smallest magnitude of enthalpy change?а.Ad. B, C and Db. Ве. А, В, С, Dс. Е4. How much energy is released when the temperature of 10.6 kg mass of a substancedecreases by 15°C, if the substance has a specific heat of 1.6J/g°C?a. 0.10 kJb. 0.25 kJc. 0.51 kJd. 1.0 x 10² kJе. 250 k]

Answered: Image /qna-images/answer/f3daf25d-5827-4876-bc6b-68a1d33836fb.jpg

Multiple Choice 1. When a match is lit, the air around the flame feels hot to the hand. Which statement best describes this observation? a. Heat is absorbed from the system, so it feels hotter. b. The reaction is endothermic. c. The potential energy of the match decreased. d. 3P) + 10KCIO (5) e. 3P + 10KCIO3 (5) 3P,O10 (6) + 10KCl + 9484 kJ 3P,O10(9 AH = 3161 kJ/molP →

Multiple Choice 1. When a match is lit, the air around the flame feels hot to the hand. Which statement best describes this observation? a. Heat is absorbed from the system, so it feels hotter. b. The reaction is endothermic. c. The potential energy of the match decreased. d. 3P) + 10KCIO (5) e. 3P + 10KCIO3 (5) 3P,O10 (6) + 10KCl + 9484 kJ 3P,O10(9 AH = 3161 kJ/molP →

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...

See similar textbooks

Similar questions

3. In the following reaction, energy is given off. Where does the energy go? 2 C(s) + O₂(g) = 2 CO(g) a. To the reactants b. To the products c. To the system d. To the surroundings
17. An ice cube is placed in a sealed insulated container of hot water at 80°C. After five minutes, the ice cube disappears. Ice Cube Heat ener Hot Water 5 min. Water Which best describes the change that took place inside the container? The total heat energy in the container was reduced by the ice cube. The hot water lost the same amount of heat energy as the ice cube gained. in the hot water was reduced by kinetic energy in the ice cube. O Heat energy in the ice cube was dissipated into the hot water.
All changes saved 20. Which device can be used to determine the amount of heat absorbed by the surroundings in a reaction? a thermometer a spectrometer a calorimeter a photometer O O
Consider the reaction. 2Fe2O3⟶4Fe+3O2 Δ?∘rxn=+824.2 kJ The decomposition of 74.0 g of Fe2O3 results in A.) the release of 382 kJ of heat. B.) the absorption of 191 kJ of heat. C.) the release of 191 kJ of heat. D.) the absorption of 30500 kJ of heat. E.) the release of 30500 kJ of heat. F.) the absorption of 382 kJ of heat.
113 kJ of heat is absorbed when one mole of carbon reacts with one mole of water. Energy + C + H2O → CO + H2 According to the reaction above it can be concluded that the reaction is a endothermic, because the change of enthalpy was negative b exothermic, because the change of enthalpy was negative c exothermic, because the change of enthalpy was positive d endothermic, because the change of enthalpy was positive
c. Draw a potential energy diagram for the formation of NO₂(g): N₂(g) +20₂(g) → 2NO2(g). AHreaction = 66.2 kJ/mol. Label the graph with "Reactants," "Products," "AHreaction," and "Ea
Consider the decomposition of liquid hydrogen peroxide (H2O2) to form water and oxygen.a. What is the heat of formation for hydrogen peroxide?b. What is the heat of formation for liquid water?c. What is the heat of formation for gaseous oxygen? Why?d. Write the balanced chemical equations that correspond to the ΔH values you looked up for parts a, b, and c.e. Write the balanced chemical equation for the decomposition of hydrogen peroxide to form water and oxygen. (Write the equation such that the coefficient on oxygen is 1.)f. What is the heat of reaction for the process in part e?g. Draw a scale diagram of this reaction (1 cm = 100 kJ) that shows the relative energies of reactants (on the left), products (on the right), and the elements in their most stable states (in the middle). Label all the energies you know.
True or False: The test tube in which a chemical reaction is taking place feels warmer to the touch. The reaction is endothermic.
Which of the following statements about internal energy, E, is false? A. It represents all the energy within a certain amount of matter. B. Delta E is positive in exothermic reactions. C. In some processes delta E = q D. In some processes delta E = q + w
CH4(g) + 4Cl2(g) → CCI4(g) + 4HCI(g), AH = -434 kJ Based on the above reaction, what energy change occurs when 1.2 moles of methane (CH4) reacts? %3D Select one: a. 521 kJ are released b. 362 kJ are released C. 521 kJ are absorbed d. 362 kJ are absorbed
9. Consider the reaction NH4NO; (s) → NH4+ (aq) + NO3- (aq). When 1.25 g of NH,NO3 dissolves in enough water to make 25.0 mL of solution, the temperature of the solution drops from 25.8 °C to 21.9 °C. Determine the reaction enthalpy. (You may use 1.0 g/mL for the density and 4.18 J/g.°C for the specific heat of the solution.)
A chemist measures the energy change AH during the following reaction: 2 NO,(9) → N,O4(9) AH=-55.3 kJ Use the information to answer the following questions. O endothermic. This reaction is... O exothermic. Suppose 82.9 g of NO, react. O Yes, absorbed. O Yes, released. Will any heat be released or absorbed? O No. If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. Round your answer to 3 significant digits. Explanation Check 02021 McGraw Hill LLC. Al Rights Reserved