KTGHard
Question
The molar heat capacity at constant presure of nitrogen gas at STP is nearly 3.5 R. Now when the temperature is increased, it gradually increases and approaches 4.5 R. The most appropriate reason for this behaviour is that at high temperatures
Options
A.The molar heat capacity at constant presure of nitrogen gas at STP is nearly 3.5 R. Now when the temperature is increased, it gradually increases and approaches 4.5 R. The most appropriate reason for this behaviour is that at high temperatures
B.nitrogen molecules dissociate in atoms
C.the molecules collides more frequently
D.molecular vibration gradually become effective
Solution
(D)
CP = 3.5 R (At STP)
As temperature increases, vibrational degree of freedom becomes 2 at higher temperature.
CP = 8/2 R = 4.5 R
CP = 3.5 R (At STP)
As temperature increases, vibrational degree of freedom becomes 2 at higher temperature.
CP = 8/2 R = 4.5 R
Create a free account to view solution
View Solution FreeMore KTG Questions
A balloon contains 500 m3 of helium at 27o0C and 1 atmosphere pressure. The volume of the helium at - 3oC temperature an...If the total number of H2 molecules is double that of the O2 molecules then the ratio of total kinetic energies of H2 to...A fixed mass of gas undergoes the cycle of changes represented by PQRSP as shown in Figure. In some of the changes, work...A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and finally turns to white h...The expansion of an ideal gas of mass m in volume at a constant pressure P is given by the straight line B. Then the exp...