Natural Gas Properties: Ideal Gas and Real Gas
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Questions and Answers

What is the standard volume of 1 lb-mol of an ideal gas at standard conditions?

  • 372.4 scf
  • 389.4 scf
  • 392.4 scf
  • 379.4 scf (correct)

    • What is the formula to calculate the specific volume of an ideal gas?

  • v = RT/PM
  • v = RT/M (correct)
  • v = PM/RT
  • v = M/RT

    • What is the unit of standard pressure?

  • atm
  • bar
  • psia (correct)
  • Pa

    • What is the formula to calculate the density of an ideal gas?

    <p>ρg = PM/RT</p> Signup and view all the answers

    What is the unit of specific volume?

    <p>ft^3/lb</p> Signup and view all the answers

    What is the assumption in calculating the properties of an ideal gas?

    <p>The gas behaves ideally</p> Signup and view all the answers

    What is the typical atmospheric condition for measuring oil volume?

    <p>60°F and 14.7 psi</p> Signup and view all the answers

    What is the result of the combustion reaction between methane and oxygen?

    <p>Production of carbon dioxide (CO2), water (H2O), and energy</p> Signup and view all the answers

    Why is it challenging to establish a single set of specifications for natural gas?

    <p>Due to the varying composition of natural gas</p> Signup and view all the answers

    How are the physical and chemical properties of natural gas determined?

    <p>By using the properties of individual components in the mixture</p> Signup and view all the answers

    What is the unit of measurement for natural gas?

    <p>Standard cubic feet (SCF)</p> Signup and view all the answers

    What is the shape of natural gas?

    <p>Shapeless and lighter than air</p> Signup and view all the answers

    At what specific gravity range is the Lee-Gonzalez-Eakin method applicable for most natural gases?

    <p>less than 0.77</p> Signup and view all the answers

    What is the range of pressures used in the Lee-Gonzalez-Eakin correlation?

    <p>100 &lt; p (psia) &lt; 8000</p> Signup and view all the answers

    What is the maximum deviation of the viscosity values predicted by the Lee-Gonzalez-Eakin method?

    <p>8.99%</p> Signup and view all the answers

    What is the unit of temperature used in the Lee-Gonzalez-Eakin correlation?

    <p>°F</p> Signup and view all the answers

    What is the parameter besides reservoir temperature and molecular weight of the gas used in the Lee-Gonzalez-Eakin method?

    <p>Gas density</p> Signup and view all the answers

    What is the primary assumption about the volume of molecules in an ideal gas?

    <p>The volume of molecules is insignificant compared to the total volume occupied by the gas.</p> Signup and view all the answers

    What is the equation of state that describes the PVT behavior of gases?

    <p>′ 𝑝𝑉 = 𝑛𝑅 𝑇</p> Signup and view all the answers

    What is the term for the attractive or repulsive forces between molecules in an ideal gas?

    <p>No attractive or repulsive forces</p> Signup and view all the answers

    What is the unit of measurement for the weight of gas in the equation 𝑚 𝑛= 𝑀?

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

    What are the standard conditions of temperature and pressure in natural gas calculations?

    <p>60°F and 14.7 psia</p> Signup and view all the answers

    What is the term for the volume of gas occupied by 1 lb-mol of gas at standard conditions?

    <p>Standard volume</p> Signup and view all the answers

    What is the unit of viscosity in which 1 poise is equal to 100?

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

    What are the factors that affect the viscosity of natural gas?

    <p>Temperature, pressure, and composition</p> Signup and view all the answers

    What is the formula to calculate the viscosity of a natural gas mixture if the composition is known?

    <p>μg = σ μgi yi MWi / 1T2</p> Signup and view all the answers

    What is the minimum mole percent of nonhydrocarbon gases that requires corrections to pseudo-critical properties?

    <p>5 mole percent</p> Signup and view all the answers

    What is the purpose of the Carr-Kobayashi-Burrows Correlation Method?

    <p>To calculate the viscosity of natural gas at one atmosphere</p> Signup and view all the answers

    What are the two popular methods used to calculate the viscosity of natural gas?

    <p>Carr-Kobayashi-Burrows and Lee-Gonzalez-Eakin Methods</p> Signup and view all the answers

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