Post a New Question

Chemistry

posted by .

If two molecules have the same temperature does it affect their average velocity depending on how heavy the molecules are or not?

  • Chemistry -

    For the same T, the kinetic energy is the same for the two molecules.
    K. E. = 1/2 m*v2
    So if K. E. is same and the masses are different, what must be true about the velocities of each.

  • Chemistry -

    That they are the same?

  • Chemistry -

    of course not.
    Use K. E. = 1/2 m*v2
    Now just put some numbers in. Say K. E. = 10 for both molecules.
    Now put in something like 10 for mass for one and calculate v. Then put in 5 for the other and calculate v. Is v the same? No. Can you see that if 1/2 mv^2 = a constant, then if m goes UP, the v must go DOWN; or if m goes DOWN, then v must go UP. If one increases the other must decrease to keep the constant a constant. right?

    Think about Boyle's law. It was
    PV = k.
    If pressure of a gas goes up the volume must go down. If presure goes down the volume goes up. You know that from the gas laws. This is the same kine of thing but instead of PV = k we have k=K.E. = 1/2 mv^2 and we know K. E. is the same from the kinetic moleuclar theory that tells us the K. E. is the same for all molecules at the same temperature.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry 101

    calculate the molecules of oxygen required to react with 28.4g of sulfur in the following reaction?
  2. Chemistry

    At a certain temperature and pressure, chlorine molecules have an average velocity of 0.0410 m/s. What is the average velocity of sulfur dioxide molecules under the same conditions?
  3. Chemistry

    If the average velocity of O2 molecules at STP is 3.4*10^3 meters/sec, what is the average velocity of H2 molecules at the same temperature and pressure?
  4. Chemistry

    At what temp do hydrogen molecules, H2, have the same rms speed as nitrogen molecules, N2, at 455 C?
  5. CHEMISTRY

    At what temp do hydrogen molecules, H2, have the same rms speed as nitrogen molecules, N2, at 455 C?
  6. chemistry

    Consider the conditions listed in the table below. Gas Temperature Pressure H2 100 oC 1 atm CH4 100 oC 20 atm O2 373 K 1 atm CO2 373 K 10 atm Which describes the characteristics of these samples?
  7. chemistry

    If, at a particular temperature, the average speed of CH4 molecules is 1000 mine/hr, what would be the average speed of CO2 molecules at the same temperature?
  8. chemistry

    If, at a particular temperature, the average speed of CH4 molecules is 1000 mine/hr, what would be the average speed of CO2 molecules at the same temperature?
  9. chemistry

    If, at a particular temperature, the average speed of CH4 molecules is 1000 mine/hr, what would be the average speed of CO2 molecules at the same temperature?
  10. chemistry

    Which statement is false? The average kinetic energies of molecules from samples of different “ideal” gases is the same at the same temperature. Molecules of a gas undergo many collisions with each other and the container walls.

More Similar Questions

Post a New Question