Physical Chemistry - 5.3.5 Explore: Using Alternative Energies Exploration Chemistry Sem 2

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5.3.5 Explore: Using Alternative Energies Exploration Chemistry Sem 2 Points Possible: 25 Name: Sana Hammad Date: 10/17/2019 In this practice, you will apply what you have learned in the lesson. Answer the questions below. Submit this sheet to your teacher when you are done.

1. How is geothermal energy being used in single-family homes? Use the link below to answer items A-D below. (10 points) The Guide to Home Geothermal Energy A. What is the principle behind geothermal energy? How can geothermal energy affect indoor temperatures in a home? (3 points) Using the temperature that underground heat up water, transport that water in pipes as it is heating and uses these pipes to use the steam in the pipes to turn turbines for energy, it affects indoor temperature by heating the houses through pipes.

B. Describe the components of a geothermal system and how they work together. (3 points) outdoor temperatures changes with the changing seasons underground temperatures do not. about four to six feet below the earth's surface, temperatures remain constant year-round. A geothermal system capitalizes on these constant temperatures. In the winter, fluid circulating through the system's earth loop absorbs stored heat and carries it indoors. The indoor unit compresses heat to a higher temperature and spreads it throughout the building. In the summer, the system reverses pulling heat from the building.

C. Vertical underground coils use fewer materials than horizontal coils. Why would horizontal coils be used in some places? (2 points) horizontal coils are exposed to more constant heat so are already warmed up.

D. How could you make sure that a geothermal system used only renewable energy? (2 points)

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Use solar panels to heat it up or contact the green energy company

2. What’s new in solar energy? Use the link below to answer items A-C below. (8 points) Dye-Sensitized Solar Cells A. What is a dye-sensitized solar cell? What materials are used to make this type of solar cell? (2 points) Dye-sensitized solar cells are solar cells that are dyed using photoactive material made using titanium dioxide.

B. What are some of the benefits of these solar cells? (3 points) Low light performance, ecologically friendly, higher temperature performance, optimized performance.

C. Using information in this article, think up an innovative use for this type of solar cell. (3 points) using them in areas that have less natural sunlight to be used efficient solar panels than others could be.

3. What do you think of when you think of a wind turbine? Use the link below to answer items A-C below. (7 points)

Small wind turbine works at low wind speeds

A. What features of this wind turbine could make it attractive to an average homeowner?

(2 points) it generates electricity in low speed wind too.

B. How is the operation of this wind turbine different from the operation of larger turbines you might see in wind farms? (2 points)

It is inside out instead of power generation happening side a gear box shaft

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turbine has magnets at the edge of the fan to generate currents.

C. Click on the Wind Map from the Department of Energy. Do you think one of these wind turbines would work well on your house or apartment building? Why or why not? (Note: 1 mi/hr = 0.45 m/s) (3 points) Yes I would have enough wind for this to make me a decent amount of energy and save costs

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