What does it is meant by that monoatomic gas have three degrees of freedom of transfer of heat(all three being translational).Explain about diatomic and triatomic gases also. Also please explain how atomicity is obtained from ratio of Cp/Cv.
2007-01-20 23:50:49 · 2 answers · asked by Tariq M 3 in Science & Mathematics ➔ Physics
Any new energy that is added to a gas is shared equally by all the available motions available in equilibrium. For a single atom this is motion in the x y z directions so the degree of freedom is 3 and Cv.=3/2R. If there are 2 atoms it can also rotate around 2 independent axis so degree of freedom is 5. If the gas is hot enough vibrational motion can also occur and produce a further increase.
Cp=Cv+R and Cv.= degrees of freedom times R so the ratio
Cp/Cv.= (1/2 x degrees of freedom+1)/(1/2 x degrees of freedom)
=5/3 monotonic
=7/5 diatomic
2007-01-21 03:05:40 · answer #1 · answered by meg 7 · 1⤊ 0⤋
an atom can go to x,y or z directions (3-degree of freedom)
a system composed of di atoms means it can do the same plus
this system can vibrate, similar for 3 atomic states
I dont remember Cp Cv but its related with the degree of freedom
2007-01-21 07:54:57 · answer #2 · answered by come2turkey:) 2 · 0⤊ 0⤋