Which of the following is a chemical reaction?

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SUMMARY

The discussion centers on identifying which scenarios constitute a chemical reaction. The options presented include heating gold, blowing a ball, burning paper, and placing sodium in water. The correct answers are III (burning paper) and IV (sodium in water), as both involve chemical changes. Understanding the definitions of chemical reactions and physical changes is essential for accurately answering such questions.

PREREQUISITES
  • Knowledge of chemical reactions and physical changes
  • Understanding of basic chemistry concepts
  • Familiarity with the properties of elements like sodium
  • Ability to differentiate between chemical and physical processes
NEXT STEPS
  • Research the definitions of chemical reactions and physical changes
  • Study the properties and reactions of alkali metals, specifically sodium
  • Learn about combustion reactions, particularly the burning of organic materials
  • Explore the concept of phase changes in matter and their implications
USEFUL FOR

This discussion is beneficial for students studying chemistry, educators teaching chemical concepts, and anyone interested in understanding the distinctions between chemical and physical changes.

kindaichi
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I am confuse here.Here is another question from my test.

Which of the following is a chemical reaction?

I.A piece of gold is being heated to melt it
II.A ball is being blown
III.A piece of paper is burnt
IV.A piece of sodium is out into a beaker of water

A.I and II
B.III and IV
C.I,II,and IV
D.I,II,III,and IV

I am absolutely clueless about this question.Can a good samaritan help out here?
 
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Type in "chemical and physical changes" at your favorite search engine. That should give you mucho leads, including the differences between the two.

Best of luck.

Steve
 
What is a chemical reaction defined as? What is a physical change defined as? The answer is quite simple if you know the definitions, if not its more complicated.