Problem 17 - Chemistry and Chemical Reactivity

Question

Which of the following is a renewable energy resource? (a) nuclear fusion (b) hydroelectric power (c) natural gas (d) coal

Step-by-Step Solution

Answer

Hydroelectric power is a renewable energy resource.

Step 1: Define Renewable Energy Resources

Renewable energy resources are sources of energy that are replenished naturally and consistently. They are generally sustainable and have a lower impact on the environment compared to non-renewable resources.

Step 2: Analyze Each Option

- **Nuclear Fusion**: This is a process that powers the sun and has potential for future energy, but is not currently used as a renewable resource. - **Hydroelectric Power**: This involves generating power from flowing water and is a well-known renewable energy source. - **Natural Gas**: Although cleaner than coal, it is a fossil fuel and thus not renewable. - **Coal**: A fossil fuel that is non-renewable and produces significant pollution.

Step 3: Determine Which Options Are Renewable

From the analysis, hydroelectric power is the only resource listed among the choices that is naturally replenished and sustainable, classifying it as a renewable energy resource.

Key Concepts

Hydroelectric Power

Hydroelectric power is a type of renewable energy that harnesses the energy of flowing water to generate electricity. It is one of the oldest and most established forms of renewable energy. This process involves using the gravitational force of falling or flowing water, usually from a dam or a waterfall, which turns a turbine connected to a generator.
There are several benefits to hydroelectric power:

• It produces no direct emissions of pollutants or greenhouse gases, making it a clean source of energy.
• It provides a reliable and consistent power supply, as water flow can be controlled and stored for demand-based electricity generation.
• It offers flexibility since it can start and stop generating electricity quickly in response to changes in electricity demand.

Despite these advantages, hydroelectric power also has some challenges:

• The construction of dams can have significant environmental impacts, such as altering ecosystems and displacing communities.
• There is a dependency on water availability, so areas prone to drought may not be ideal for hydroelectric plants.

Hydroelectric power represents a critical part of the renewable energy landscape, contributing to reducing our dependency on fossil fuels.

Nuclear Fusion

Nuclear fusion is a process that has the potential to revolutionize the way we produce energy. Unlike nuclear fission, which is used in current nuclear power plants, fusion involves combining light atomic nuclei, such as hydrogen, under high temperatures and pressure to form a heavier nucleus, releasing energy in the process.
The promise of nuclear fusion lies in its potential benefits:

• Fusion fuels, like isotopes of hydrogen (deuterium and tritium), are abundant and can be sourced from water and lithium.
• It produces minimal radioactive waste compared to fission and is considered to be a safer and cleaner option.
• Fusion has the potential to generate large amounts of energy with a relatively small amount of fuel.

Despite its potential, there are significant challenges in achieving nuclear fusion:

• The technology required to sustain the high temperatures and pressures needed for fusion is still in the developmental stage.
• Fusion reactions must be contained in specifically designed reactors, which are costly and complex.

While not yet a practical renewable energy source, successful development of nuclear fusion could dramatically alter the energy landscape in the future.

Non-renewable Resources

Non-renewable resources are energy sources that do not replenish at the same rate as they are consumed. This includes fossil fuels such as coal, oil, and natural gas. These resources are derived from ancient plant and animal matter that has undergone chemical transformations over millions of years.
Some characteristics of non-renewable resources include:

• They are finite and will eventually deplete, leading to concerns over energy security and rising costs as they become scarcer.
• When burned, they release carbon dioxide and other pollutants, contributing to air pollution and climate change.
• Extraction and use can have harmful effects on the environment, including habitat destruction and oil spills.

Because of their significant impact on the environment, there is a push towards reducing reliance on non-renewable resources by increasing the use of renewable energy sources. However, the transition must be managed carefully to ensure energy needs continue to be met while reducing environmental impact.