Environmental Science: GHG Emission Factors Quiz
53 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What does the Global Warming Potential (GWP) of a greenhouse gas indicate?

  • The amount of heat trapped by the gas compared to CO2. (correct)
  • The volume of the gas produced compared to CO2.
  • The frequency of emissions per year compared to CO2.
  • The cost of emitting the gas compared to CO2.

    • Which of the following describes an emission factor?

  • The average amount of emissions per unit of product or use. (correct)
  • The total greenhouse gases emitted from a power plant per year.
  • The ratio of pollutants emitted to total energy consumed.
  • The maximum allowable emissions from a manufacturing plant.

    • Which fossil fuel power plant has the highest GHG emission factor?

  • Coal power plants. (correct)
  • Nuclear power plants.
  • Renewable energy sources.
  • Natural gas power plants.

    • What is the significance of the Lower Explosive Limit (LEL) in gaseous pollutants?

    <p>It indicates when there is insufficient fuel for combustion.</p> Signup and view all the answers

    What is the GWP value of methane (CH4) stated in the content?

    <ol start="84"> <li></li> </ol> Signup and view all the answers

    In terms of GHG emissions per kWh, which renewable energy source has the lowest emission factor?

    <p>Photovoltaic (PV) systems.</p> Signup and view all the answers

    Above what concentration level does a gaseous pollutant become explosive?

    <p>Between the LEL and UEL.</p> Signup and view all the answers

    Why are emission factors important for estimating pollutant emissions?

    <p>They help quantify emissions based on specific usage scenarios.</p> Signup and view all the answers

    What is the molecular weight of toluene C6H5CH3?

    <p>92 g/mol</p> Signup and view all the answers

    How is the pressure of 22 mmHg converted to atm?

    <p>0.0289 atm</p> Signup and view all the answers

    What is the concentration of toluene in mg/L?

    <p>110.4 mg/L</p> Signup and view all the answers

    What does the equilibrium vapor pressure indicate?

    <p>A liquid's evaporation rate</p> Signup and view all the answers

    What is the value of 22 mmHg in ppm?

    <p>28947 ppm</p> Signup and view all the answers

    Using the perfect gas law, what is the calculated amount of substance (n) in mol/L for toluene?

    <p>1.2 · 10^-3 mol/L</p> Signup and view all the answers

    What is the unit of vapor pressure?

    <p>mmHg</p> Signup and view all the answers

    At what temperature does the calculation assume for the perfect gas law?

    <p>293.15 K</p> Signup and view all the answers

    What is a common source of groundwater contamination?

    <p>Fuel leaks from underground storage tanks</p> Signup and view all the answers

    Which type of contaminant is BTEX associated with?

    <p>Hydrocarbons</p> Signup and view all the answers

    Which of the following is NOT a type of hydrocarbon contamination?

    <p>Sediment contamination</p> Signup and view all the answers

    What characteristic does benzene possess?

    <p>Colourless and sweet-smelling</p> Signup and view all the answers

    Which of the following contaminants is primarily associated with gasoline?

    <p>MTBE</p> Signup and view all the answers

    Why is benzene considered hazardous?

    <p>It is highly flammable</p> Signup and view all the answers

    What does the acronym LNAPL stand for?

    <p>Light Non-Aqueous Phase Liquid</p> Signup and view all the answers

    Which process can lead to the evaporation of contaminants from groundwater?

    <p>Volatilization</p> Signup and view all the answers

    What is ethylbenzene primarily derived from?

    <p>Crude oil</p> Signup and view all the answers

    What is a significant consequence of oil spills?

    <p>Groundwater contamination</p> Signup and view all the answers

    What was the primary goal of the PFOA Stewardship Program launched in 2006?

    <p>To phase out production of PFOA and other PFAS</p> Signup and view all the answers

    Why are PFAS found in low levels in plants, animals, and humans?

    <p>They persist in the environment.</p> Signup and view all the answers

    Which measurement units are used for pollutant concentrations in the air phase?

    <p>PpmV and ppbV</p> Signup and view all the answers

    What does '1 mole' correspond to in terms of molecules?

    <p>6.022·10^23 molecules</p> Signup and view all the answers

    What is a necessary condition for mass/volume concentrations of pollutants in air discussed?

    <p>It might relate to a certain flue gas temperature.</p> Signup and view all the answers

    What is the molecular weight defined as?

    <p>The weight of 1 mole of a substance</p> Signup and view all the answers

    When discussing concentrations in liquid phases, which of the following is most relevant?

    <p>Molar and mass/volume concentrations</p> Signup and view all the answers

    Which of the following statements about PFAS is incorrect?

    <p>PFAS production has stopped entirely in the US.</p> Signup and view all the answers

    What is the typical dissolved oxygen (DO) concentration at saturation at 1 atm and typical ambient temperatures?

    <p>10 mg/L</p> Signup and view all the answers

    According to Henry’s law, what happens to the concentration in the liquid phase if the partial pressure increases by four times?

    <p>It increases to 40 mg/L</p> Signup and view all the answers

    What is the calculated dimensionless Henry's law constant for naphthalene given the provided values?

    <p>4.79 × 10^{-2}</p> Signup and view all the answers

    How is the vapour pressure of naphthalene related to its solubility according to Henry's law?

    <p>It is directly proportional</p> Signup and view all the answers

    What percentage of the total naphthalene ends up in the air-filled volume of the bottle at equilibrium?

    <p>48%</p> Signup and view all the answers

    What is the unit of measurement for Henry's constant in the provided example?

    <p>atm·L/mol</p> Signup and view all the answers

    When naphthalene is added to water, which of the following parameters determines the extent to which it will partition between the air and the water?

    <p>All of the above</p> Signup and view all the answers

    What is the vapor pressure of naphthalene at 20°C as stated in the content?

    <p>3 × 10^{-4} atm</p> Signup and view all the answers

    What happens to the concentration of a contaminant in the liquid phase as more sorbent is added?

    <p>It decreases as it is sorbed by the solid.</p> Signup and view all the answers

    Which of the following best describes the Langmuir isotherm?

    <p>It is an asymptotical isotherm.</p> Signup and view all the answers

    In the context of sorption, what does the variable S phenol represent?

    <p>Sorption capacity of the solid phase.</p> Signup and view all the answers

    Which isotherm type is indicated by the equation of a curve that approaches a maximum value but never touches it?

    <p>Langmuir isotherm.</p> Signup and view all the answers

    What is the primary focus of examining solid-liquid isotherms?

    <p>To analyze equilibrium concentrations of contaminants.</p> Signup and view all the answers

    At which stage will the concentration in the liquid phase not decrease despite adding more sorbent?

    <p>When the sorbent reaches saturation.</p> Signup and view all the answers

    What characteristic is typical for Freundlich isotherms?

    <p>They indicate variable sorption capacity with concentration.</p> Signup and view all the answers

    Which of the following concentrations represents a decrease in the liquid phase as more sorbent is added?

    <p>16.6 mg/L.</p> Signup and view all the answers

    What is the role of increasing the mass of sorbent in the given experiment?

    <p>To enhance the sorption capacity for the contaminant.</p> Signup and view all the answers

    Why is it important to study sorption isotherms?

    <p>To understand how contaminants interact with solids.</p> Signup and view all the answers

    Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser