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Why are gases more viscous at higher temps?

  1. Mar 30, 2012 #1
    I'd expect that since they carry more kinetic energy, they are more fluid.

  2. jcsd
  3. Mar 30, 2012 #2
    Why does them carrying more kinetic energy suggest that they're more fluid?
  4. Mar 30, 2012 #3
    Because they can move past each other more easily. Similar to a faster speed of a spacecraft being able to overcome gravitational pull.
  5. Mar 30, 2012 #4
    The more kinetic energy gases get, they also increase the number of collisions between the particles. This increased number of collisions is the reason why gases are more viscous at higher temperatures, because their particles are not able to go very far without colliding.
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