Textbook Question
Indicate whether each of the following statements describes potential or kinetic energy:
b. kicking a ball
1
views
Ch.3 Matter and Energy
Timberlake13th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9780134421353
Not the one you use?Change textbookSelect a different textbook
Table of contents
- Ch.1 Chemistry in Our Lives11
- Ch.2 Chemistry and Measurements80
- Ch.3 Matter and Energy54
- Ch.4 Atoms and Elements51
- Ch.5 Nuclear Chemistry42
- Ch.6 Ionic and Molecular Compounds57
- Ch.7 Chemical Quantities and Reactions41
- Ch.8 Gases29
- Ch.9 Solutions51
- Ch.10 Acids and Bases and Equilibrium65
- Ch.11 Introduction to Organic Chemistry: Hydrocarbons78
- Ch.12 Alcohols, Thiols, Ethers, Aldehydes, and Ketones83
- Ch.13 Carbohydrates54
- Ch.14 Carboxylic Acids, Esters, Amines, and Amides90
- Ch.15 Lipids61
- Ch.16 Amino Acids, Proteins, and Enzymes84
- Ch.17 Nucleic Acids and Protein Synthesis83
- Ch.18 Metabolic Pathways and ATP Production67
Timberlake13th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9780134421353Not the one you use?Change textbook
Chapter 3, Problem 23c
Indicate whether each of the following statements describes potential or kinetic energy:
c. the energy in a lump of coal
Verified step by step guidance1
Understand the difference between potential and kinetic energy: Potential energy is stored energy based on an object's position, composition, or condition, while kinetic energy is the energy of motion.
Analyze the situation: A lump of coal is stationary and not in motion, so it does not possess kinetic energy.
Consider the composition of coal: Coal contains chemical energy stored in its molecular bonds, which can be released during combustion. This stored energy is a form of potential energy.
Conclude that the energy in a lump of coal is potential energy because it is stored in the chemical bonds and not currently in motion or being used.
Remember that potential energy can be converted into kinetic energy when the coal is burned, releasing energy in the form of heat and light.
Verified video answer for a similar problem:
This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
1mWas this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Potential Energy
Potential energy is the stored energy in an object due to its position or state. It is energy that has the potential to be converted into kinetic energy when the object is in motion. For example, a lump of coal has potential energy because it can release energy when burned, making it a source of fuel.
Recommended video:
Guided course
01:26
Nature of Energy
Kinetic Energy
Kinetic energy is the energy of an object in motion. It depends on the mass of the object and the square of its velocity, represented by the formula KE = 1/2 mv². Unlike potential energy, kinetic energy is active and can be observed when an object is moving, such as a car driving down the road.
Recommended video:
Guided course
01:19Kinetic Molecular Theory Concept 1
Energy Transformation
Energy transformation refers to the process of changing energy from one form to another. In the context of coal, when it is burned, the potential energy stored in the coal is transformed into thermal energy (heat) and light energy, which can then be used to perform work, such as generating electricity.
Recommended video:
Guided course
01:26Nature of Energy
Related Practice
Textbook Question
Discuss the changes in the potential and kinetic energy of a roller-coaster ride as the roller-coaster car climbs to the top and goes down the other side.
1
views
Textbook Question
During extreme hypothermia, a child's temperature dropped to 20.6 °C. What was his temperature in degrees Fahrenheit?
2
views
Textbook Question
Using the energy values for foods (see TABLE 3.7), determine each of the following (round off the answer for each food type to the tens place):
a. the total kilojoules in two tablespoons of crunchy peanut butter that contains 6 g of carbohydrate, 16 g of fat, and 7 g of protein
2
views
Textbook Question
For dinner, Charles had one cup of clam chowder, which contains 16 g of carbohydrate, 12 g of fat, and 9 g of protein. How much energy, in kilocalories and kilojoules, is in the clam chowder? (Round off the answer for each food type to the tens place.)
1
views
Textbook Question
Using the energy values for foods (see TABLE 3.7), determine each of the following (round off the answer for each food type to the tens place):
d. the grams of fat in one avocado that has 405 kcal, 13 g of carbohydrate, and 5 g of protein
3
views