Introductory Chemistry For Today
8th Edition
ISBN: 9781285644561
Author: Seager
Publisher: Cengage
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- Water is put on the stove and heated with a natural gas burner. After some time, the water begins to bubble, and steam is given off. What kind of change has occurred? a. physical b. chemical c. no change has occurredarrow_forward1.13 Physical properties may change because of a chemical change. For example, the color of an egg white changes from clear to white because of a chemical change when it is cooked. What is another common situation in which a chemical change also leads to a physical change?arrow_forwardClassify the following changes as chemical C or physical P a Baking bread b Grinding sugar into powder c What type of change is represented in c.? d What type of change is represented in d.?arrow_forward
- Matter in the __________ state has no shape and fills completely whatever container holds it.arrow_forwardThe following photo shows the element potassium reacting with water to from the element hydrogen, a gas, and a solution of the compound potassium hydroxide. (a) What states of matter are involved in the reaction? (b) Is the observed change chemical or physical? (c) What are the reactants in this reaction, and what are the produces? (d) What qualitative observations can be made concerning this reaction?arrow_forwardCompare and contrast the ease with which molecules are able to move relative to each other in the three states of matter.arrow_forward
- The photo below shows elemental iodine dissolving in ethanol to give a solution. Is this a physical or chemical change?arrow_forwardA hot metal block is plunged into water in a well-insulated container. The temperature of the metal block goes down, and the temperature of the water goes up until their temperatures are the same. A total of 1500 J of energy' is lost by the metal object. By how much did the energy of the water increase? What law of science is illustrated by this problem?arrow_forwardClassify each of the following as a physical or chemical change, and give at least one observation, fact, or reason to support your answer. a. A plum ripens. b. Water boils. c. A glass window breaks. d. Food is digested.arrow_forward
- How does a homogeneous mixture differ from a pure substance? How are they similar?arrow_forwardDuring a very cold winter, the temperature may remain below freezing for extended periods. However, fallen snow can still disappear, even though it cannot melt. This is possible because a solid can vaporize directly, without passing through the liquid state. Is this process (sublimation) a physical or a chemical change?arrow_forward
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