Question

calculate the root mean square velocity of F2,Cl2 and Br2 at 302k.

Answer 1

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Answer 2

vrms = (the square root of)3RT/M

Answer 3

"vrms" means velocity root mean squared.
The molar gas constant "R", has the value 8.3143 J/mol K,
and the temperature "T", is in Kelvin.
Since the joules has units kg *m^2/s^2, the molar mass must be in kg/mol

Answer 4

Thank you
can you solve it for me

Answer 5

I can guide you , but i can't answer it

Answer 6

what is the molar mass of F2

Answer 7

here is a molar mass calculator http://www.lenntech.com/calculators/molecular/molecular-weight-calculator.htm

Answer 8

actually i have no idea about this stuffs just helping my friend here

Answer 9

thanx though

Answer 10

sure

Answer 11

Using the formula
vrms = (the square root of)3RT/M,
R = 8.3143 J/mol K
Temperature = 302 K
Molar mass F2 = 0.0380 kg / mol
Molar mass Cl2 = 0.0709 kg / mol
Molar mass Br2 = 0.15981 kg / mol


vrms F2 = [(3)(302 K)(8.3143 J/mol K) / (0.0380 kg/mol)]^1/2 =445.23 m/s
vrms Cl2 =[(3)(302 K)(8.3143 J/mol K) / (0.0709 kg/mol)]^1/2 =325.95 m/s
vrms Br2 =[(3)(302 K)(8.3143 J/mol K) / (0.15981 kg/mol)]^1/2 =217.10 m/s