Label each of the following as either a physical process or a chemical process: (a) crushing a metal can (b) production of urine in the kidneys
Ch.1 - Introduction: Matter, Energy, and Measurement
Chapter 1, Problem 23
Which separation method is better suited for obtaining sugar from cane juice—filtration or evaporation?

1
Step 1: Understand the composition of cane juice, which is a mixture of sugar, water, and other impurities.
Step 2: Consider the principle of filtration, which is used to separate solids from liquids. Filtration would not be effective here because sugar is dissolved in the liquid, not present as a solid.
Step 3: Consider the principle of evaporation, which involves heating the solution to remove the solvent (water) and leave behind the solute (sugar).
Step 4: Recognize that evaporation is suitable for separating sugar from cane juice because it allows the water to evaporate, leaving the sugar behind.
Step 5: Conclude that evaporation is the better method for obtaining sugar from cane juice, as it effectively separates the dissolved sugar by removing the water.
Related Practice
Textbook Question
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Textbook Question
Label each of the following as either a physical process or a chemical process: (c) melting a piece of chocolate (d) burning fossil fuel (e) discharging a battery.
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Textbook Question
A match is lit and held under a cold piece of metal. The following observations are made: (a) The match burns. (b) The metal gets warmer. (c) Water condenses on the metal. (d) Soot (carbon) is deposited on the metal. Which of these occurrences are due to physical changes, and which are due to chemical changes?
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Textbook Question
A silvery metal is put inside a beaker of water. Bubbles form on the surface of the metal and it dissolves gradually. (a) Is this an example of a chemical or a physical change?
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Textbook Question
(a) Calculate the kinetic energy, in joules, of a 15-g bullet moving at 120 m/s.
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Open Question
A baseball weighs 145.4 g. What is the kinetic energy, in joules, of this baseball when it is thrown by a major league pitcher at 150 km/h?