Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Doggiebounce Group Title

What is the average kinetic energy of 1 mole of a gas at 125 Kelvin? (R = 8.314 J/K-mol) A. 1.04 x 10^3 J B. 3.12 x 10^3 J C. 1.56 x 10^3 J D. 1.77 x 10^3 J

  • one year ago
  • one year ago

  • This Question is Closed
  1. chmvijay Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    do you know equation for average kinetic energy

    • one year ago
  2. .Sam. Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    From kinetic theory, \[E_K=\frac{1}{2}m<c^2>=\frac{3}{2}k_BT\] --------------------------------------- We can say that \[E_K=\frac{3}{2}k_BT\] \(k_B=Boltzmann~Constant=1.38 \times 10^{-23}m^2kgs^{-2}K^{-1}\) Substitute in \[E_K=\frac{3}{2}(1.38 \times 10^{-23})(125)=?\] Multiply that by avogadro number \(N_A\) gives average kinetic energy

    • one year ago
  3. .Sam. Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    @chmvijay do you have a different approach? I can't think of one relating R

    • one year ago
  4. chmvijay Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ur right i is 3KT/2

    • one year ago
  5. .Sam. Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    yeah but the problem is the question includes (R = 8.314 J/K-mol)

    • one year ago
  6. Pumpkin890 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Did anyone ever figure out how to do this?

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.