For a monatomic ideal gas, the ratio of specific heats (γ) is approximately: (20

Practice Questions

Q1
For a monatomic ideal gas, the ratio of specific heats (γ) is approximately: (2019)
  1. 1.5
  2. 1.67
  3. 1.4
  4. 2

Questions & Step-by-Step Solutions

For a monatomic ideal gas, the ratio of specific heats (γ) is approximately: (2019)
  • Step 1: Understand that a monatomic ideal gas consists of single atoms, like helium or neon.
  • Step 2: Learn about specific heats: C_p is the specific heat at constant pressure, and C_v is the specific heat at constant volume.
  • Step 3: Know that for a monatomic ideal gas, the ratio of specific heats (γ) is defined as γ = C_p / C_v.
  • Step 4: Remember the values for a monatomic ideal gas: C_p = 5/2 R and C_v = 3/2 R, where R is the gas constant.
  • Step 5: Calculate γ by substituting the values: γ = (5/2 R) / (3/2 R).
  • Step 6: Simplify the equation: γ = (5/2) / (3/2) = 5/3.
  • Step 7: Conclude that for a monatomic ideal gas, γ is approximately 5/3, which is equal to 1.67.
  • Specific Heats – The specific heats at constant pressure (C_p) and constant volume (C_v) are fundamental properties of gases that relate to their thermal behavior.
  • Monatomic Ideal Gas – A monatomic ideal gas consists of single atoms and follows the ideal gas law, with specific heat ratios that can be derived from kinetic theory.
  • Ratio of Specific Heats (γ) – The ratio of specific heats (γ) is a dimensionless number that indicates the relationship between the heat capacities of a gas and is crucial for understanding thermodynamic processes.
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