CHEM ideal gas
posted by Kimora .
hi
i am working on trying to derive KE (or Etrans)=3/2nRT
so i know these steps
that
___________
pV= nRT
and pV= 1/3 NmV2
and combining them, we get
nRT= 1/3Nmv2
also, we know that for translational motion, KE= 1/2Nmv2
______
i don't know how
2/3 (1 /2 Nmv2) = nRT
where did that 2/3 come from??!!
i know that subsequently, it will be 2/3KE= nrt
and i will get KE=3/2 nRT
i just don't KNOW WHERE THE 2/3 came from in the first place!

2/3 x 1/2 is another way of writing 1/3. The equations
nRT= (1/3)Nmv^2
and
nRT = (2/3)(1/2)NmV^2
are equivalent.
Respond to this Question
Similar Questions

chemistry
Gas X has a density of 2.60g/L at STP. Determine the molar mass of this gas. Sorry there was some typos on the previous question. please show me again steps by steps. thank you =] Same answer. You just left the g off the density. One … 
REETA
A 2.10 mol sample of oxygen gas is confined to a 5.10 L vessel at a pressure of 7.99 atm. Find the average translational kinetic energy of an oxygen molecule under these conditions in (j/mol) When i was working this out i tried using … 
physics
A 2.10 mol sample of oxygen gas is confined to a 5.10 L vessel at a pressure of 7.99 atm. Find the average translational kinetic energy of an oxygen molecule under these conditions in (j/mol) When i was working this out i tried using … 
Physics ideal gases
Would someone check my thinking please. PVT of an ideal gas (nitrogen) are all given. I've used PV=nRT rearranged to get the number of moles. Then, U= 3/2nRT to get the internal energy of the sample. Am I on the right track? 
chemistry
. Consider a nonideal gas with the equation of state: where b is a constant. i) Derive expressions for: (P/T)V and (T/V)P ii) For a constant temperature process involving this nonideal gas, show that … 
Chemistry
According to the ideal gas law a 9.03 sample of oxygen gas in a 0.8112 container at 499k should exert a pressure of 456atm. By what % does the pressure calculated using van der waals equation differ from the ideal pressure? 
Chem Ideal Gas Law
A 1.05 g sample of an ideal gas occupies 1.045 L at 20.0°C and 0.975 atm. What will be its volume at 8.6°C and 0.5 atm? 
chemistry
Which one of the following statements regarding ideal gas laws is FALSE? 
Chemistry
A calorimeter is filled with 10.0 millimole (mmole) of methane gas and an excess of oxygen. When burned, the ignition wire releases 140.77 J of heat. The heat capacity of the calorimeter is 4.319 KJ°C1. qwire= 140.77 J Calculate … 
chemistry
If I contain 3 moles of gas in a container with a volume of 60 liters and at temperature of 400 K, what is the pressure inside the container?