Calculating a particles most probable speed

  1. [SOLVED] Calculating a particles most probable speed

    1. The problem statement, all variables and given/known data

    Diatomic carbon dioxide gas (CO2) has molar mass of 44.0 g/mol is at a temperature of 281 Kelvin.

    Calculate the most probable speed .

    2. Relevant equations

    [tex] V_m_p = \sqrt{\frac{2*k_B*t}{m}} [/tex]

    3. The attempt at a solution

    [tex] V_m_p = \sqrt{\frac{2*(1.3807*10^-^2^3)*281}{44}} [/tex]

    I have also tried with

    [tex] V_m_p = \sqrt{\frac{2*(1.3807*10^-^2^3)*281}{0.044}} [/tex]

    with m in kg/mol, but to no avail. I am sure this is the right equation,

    TFM
     
  2. jcsd
  3. The m stands for mass, not mass per mol!

    Convert the 44g/mol to kg first.
     
  4. It doesn't specify the number of moles, so is it the mass of an individual particle?

    TFM
     
  5. I've just checked and it is.

    thanks Nick89 :smile:
     
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