Read the descriptions of physical or chemical changes in the table below. Then decide whether the change will be spontaneous, if you can. Change Is this change spontaneous? Yes. A solid substance dissolves in water, releasing heat as it does so. O No. Can't decide with information given. Yes. A solid precipitates from a solution, absorbing heat as it does so. O No. O Can't decide with information given. Yes. An endothermic chemical reaction between two liquids results in gaseous products. O No. O Can't decide with information given.

Read the descriptions of physical or chemical changes in the table below. Then decide whether the change will be spontaneous, if you can. Change Is this change spontaneous? Yes. A solid substance dissolves in water, releasing heat as it does so. O No. Can't decide with information given. Yes. A solid precipitates from a solution, absorbing heat as it does so. O No. O Can't decide with information given. Yes. An endothermic chemical reaction between two liquids results in gaseous products. O No. O Can't decide with information given.

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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A metal object with mass of 20.9 g is heated to 97.0 °C and then transferred to an insulated container containing 83.1 g of water at 20.5 °C. The water temperature rises and the temperature of the metal object falls until they both reach the same final temperature of 23.9 °C. What is the specific heat of this metal object? Assume that all the heat lost by the metal object is absorbed by the water. cal specific heat: g. C TOOLS x10 okd DII DD F11 F9 F10 F8 EZ
Calculate the enthalpy change of the exothermic reaction of 5.20 g of CaCl2(s) dissolved in 0.32 kg of water inside a coffee-cup calorimeter. The combined initial and final temperatures were 20.8°C and 29.4°C, respectively. * a. -12 KJ b. -62 KJ c. 92 KJ d. 48 KJ
In the past, scientists were surprised that an endothermic process like the one in this lab, could be spontaneous. Which statement correctly describes why it seems like an endothermic process should not be spontaneous? Group of answer choices All endothermic processes create order in both the system and surroundings. Endothermic processes cause heat to flow from a cold object to a hot object. A process that spontaneously takes in energy seems to be analogous to a rock rolling up a hill. Endothermic processes become so cold that molecular motion stops.
Please answer question 20 part A
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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.
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Substance X was dissolved in a beaker of water, and it was observed that the beaker felt warmer. This is an example of an exothermic process. true or false
A sample of 175°C copper is placed into a beaker with 100 grams of 25°C water. Which sample of copper will heat the water to the lowest final temperature? The specific heat of copper is 0.385 J-g-1.°C-1. The specific heat of water is 4.184 J·g-1.°C-1. A. 5.0 g Cu B. 2.0 g Cu C. 0.5 g Cu D. 1.0 g Cu
Which one of the following statements is not correct? Select one: a. In any physical process, such as dew forming on grass or carbon dioxide subliming, the internal energy of the system does not change. b. When dew forms on grass overnight, the energy of the water molecules decreases. c. When dry ice sublimes to form CO2(g), the energy of the carbon dioxide increases. d. When dew forms on grass overnight, the energy of the surroundings (grass, air, etc.) increases. e. When dry ice sublimes to form CO2(g), the internal energy of the surroundings decreases.