Register to reply

Calculating a particles most probable speed

by TFM
Tags: particles, probable, solved, speed
Share this thread:
TFM
#1
Apr24-08, 01:23 PM
P: 1,031
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
Phys.Org News Partner Science news on Phys.org
Scientists develop 'electronic nose' for rapid detection of C. diff infection
Why plants in the office make us more productive
Tesla Motors dealing as states play factory poker
Nick89
#2
Apr24-08, 01:29 PM
P: 550
The m stands for mass, not mass per mol!

Convert the 44g/mol to kg first.
TFM
#3
Apr24-08, 01:35 PM
P: 1,031
It doesn't specify the number of moles, so is it the mass of an individual particle?

TFM

TFM
#4
Apr24-08, 02:16 PM
P: 1,031
Calculating a particles most probable speed

I've just checked and it is.

thanks Nick89


Register to reply

Related Discussions
Light speed...Impossible Faster than light..Probable? General Physics 5
Calculating planet speed Introductory Physics Homework 3
Probable distance in the 2p state (H atom) Advanced Physics Homework 2
Most probable molecular speed? Advanced Physics Homework 9
Calculating speed from acceleration Special & General Relativity 23