please give a answer with explanation 1-During an experiment vinegar was added to baking soda. The following observations were recorded.Observation 1: The container with the reaction mixture feels cooler.Observation 2: Gas bubbles are released.Based on the observation, justify the type of change (physical or chemical) that took place.

Answered: Image /qna-images/answer/d971522e-1093-491c-a1a2-80c7d8f62542.jpg

Answered: 1-During an experiment vinegar was…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter4: Energy And Chemical Reactions

Section: Chapter Questions

Problem 4.BCP

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A book is held 6 feet above the floor and then dropped. Which statement is true? a.The potential energy of the book is converted to kinetic energy. b.The potential energy of the book is destroyed. c.Kinetic energy is created. d.The total energy of the system will not be conserved.
True or false? Mixtures always result in a chemical reaction because they consist of two or more substances and thus combine to create a new product.
Is there a difference between a homogeneous mixture of hydrogen and oxygen in a 2:1 ratio and a sample of water vapor? Explain.
Classify the following processes according to their rates as very slow, slow, or fast: a.The melting of butter put into a hot pan b.The ripening of a piece of fruit stored at room temperature c.The cooking of a raw potato in a hot oven d.The melting of ice cube in a glass of cool water e.The combustion of gasoline in the engine of a car
Classify the following processes according to their rates as very slow, slow, or fast: a.The souring of milk stored in a refrigerator b.The cooking of an egg in boiling water c.The rusting of a shovel left in the garden over the winter d.The growing of corn during a warm summer e.The burning of a lighted match.
Suppose that you are closing a cabin in the north woods for the winter and you do not want the water in the toilet tank to freeze. You know that the temperature might get as low as 30. C, and you want to protect about 4.0 L water in the toilet tank from freezing. Calculate the volume of ethylene glycol (density = 1.113 g/mL; molar mass = 62.1 g/mol) you should add to the 4.0 L water.
Some farmers use ammonia, NHS, as a fertilizer. This ammonia is stored in liquid form. Use the particulate perspective to show the transition from liquid ammonia to gaseous ammonia.
1. The rusting of iron is due to its reaction with oxygen. An iron nail weighing 8.531 g was left outdoors for a period of one year. After the one year it was found to have a mass of 12.197 g. How many grams of oxygen did the nail react with? 2. What is the temperature of the deep freezer in question 11 above, expressed in Kelvin? (Please note that the constant 273.15 is an exact number).
Indicate for the examples below if the change is physical (P) or chemical (C).31) rocks are ground into gravel ____ 41) a hamburger is grilled ____32) concrete cures to a solid mass ____ 42) molten copper forms a penny ____33) frost forms on a cold window ____ 43) a candle is burned ____34) milk turns sour ____ 44) sugar is dissolved in hot coffee ____35) lightbulb generates light ____ 45) an iron railing rusts ____36) leaves change color in the fall ____ 46) a shaken soda overflows on opening ____37) sunlight yellows white paint ____ 47) compost heap is warm to the touch ____38) a volcano erupts ____ 48) a sunset creates a red-orange sky ____39) heated sugar forms caramel ____ 49) corn mash ferments (for bourbon) ____40) bread dough rises from yeast ____ 50) salt air attacks a bridge’s steel I-beam ___
A student dissolves 13.7 g of potassium hydroxide KOH in 200. g of water in a well-insulated open cup. He then observes the temperature of the water rise from 22.0°C to 34.0°C over the course of 7.3 minutes. KOHs + K+aq -> OH−aq You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to the correct number of significant digits. Is this reaction exothermic, endothermic, or neither? If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. Calculate the reaction enthalpy ΔHrxn per mole of KOH .
98. In order to check for concentration or amounts of substances, principles of this branch of chemistry is applied: A. Quantitative Chemistry B. Inorganic Chemistry C. Organic Chemistry D.Qualitative Chemistry E. General Chemistry 99. Which of the following leads to an overall decrease in energy of a system? A. Freezing B. Melting C. Vaporization D. Sublimation
5. Two aqueous NaCl solutions of equal volume and concentration were kept in flasks and held at different temperatures. The two solutions were combined in a larger flask. Based on this information, which of the following predictions is correct?a. The average kinetic energy of the particles in the cooler solution will decrease as they collide with the particles from the warmer solution.b. The average kinetic energy of the particles in the cooler solution will increase as they collide with the particles from the warmer solution.c. The particles from the cooler solution and the particles from the warmer solution will reach thermal equilibrium through collisions, at which time theaverage kinetic energy of the particles in the mixture will be lower than theaverage kinetic energy that the particles had in the cooler solution.d. Theparticlesfromthecoolersolutionandtheparticlesfromthewarmersolution will reach thermal equilibrium through collisions, at which time the average kinetic energy of…

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