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Objectives for Chapter 8

# Objectives for Chapter 8 - Objectives for Chapter 8 1...

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Objectives for Chapter 8 1. Distinguish between potential energy and kinetic energy, and give examples of each form. - Potential energy is the energy that matter possesses because of its location or structure. Chemical energy is a form of potential energy stored in molecules because of the arrangement of their atoms. - Kinetic energy is the energy associated with the relative motion of objects. -- Objects in motion can perform work by imparting motion to other matter. Photons of light can be captured and their energy harnessed to power photosynthesis in green plants. Heat or thermal energy is kinetic energy associated with the random movement of atoms or molecules. 2. Explain the first and second laws of thermodynamics in your own words. What is entropy? 1 st law- energy can b transformed transferred but not created nor destroyed 2 nd law- every energy transfer or transformation increases the entropy of the universe. Entropy is the measure of disorder or randomness 3. What does the second law of thermodynamics predict about changes in disorder (randomness)? While order can increase locally, there is an unstoppable trend toward randomization of the universe. Much of the increased entropy of the universe takes the form of increasing heat, which is the energy of random molecular motion. 4. Examine figure 8.5 and explain why each of the examples at the top of the figure has more free energy (potential energy to do work) than the corresponding example at the bottom of the figure.

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Objectives for Chapter 8 - Objectives for Chapter 8 1...

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