The graph which represents the variation of mean kinetic energy of molecules with temperature t°C is ?

(1)

 

(2)

(3) 

(4)

Concept Questions :-

Kinetic energy of gas
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Vrms,Vav,Vmp are root mean square, average and most probable speeds of molecules of a gas obeying Maxwellian velocity distribution. Which of the following statements is correct?

1. Vrms<Vav<Vmp

2. Vrms>Vav>Vmp

3. Vrms < Vav>Vmp

4. Vavg>Vrms<Vmp

Concept Questions :-

Types of velocity
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Gas is found to obey the law P2V = constant. The initial temperature and volume are T0 and V0. If the gas expands to a volume 3V0, its final temperature becomes:

(a) T03           (b) T03

(c) 3T0           (d) None of these

Concept Questions :-

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For a gas, the r.m.s speed at 800 K is:

(1) Four times the value at 200 K

(2) Half the value at 200 K

(3) Twice the value at 200 K

(4) Same as at 200 K

Concept Questions :-

Types of velocity
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The average kinetic energy of a helium atom at 30°C is:                                                                                           [MP PMT 2004]

(1) Less than 1 eV

(2) A few KeV

(3) 50-60 eV

(4) 13.6 eV

Concept Questions :-

Kinetic energy of gas
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The mean translational kinetic energy of a perfect gas molecule at the temperature T Kelvin is:

(1) 12kT         (2) kT             (3) 32kT            (4) 2 kT

Concept Questions :-

Kinetic energy of gas
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Choose the correct option related to the specific heat at constant volume CV -

(1) CV=12fR              (2) CV=Rγ-1

(3) CV=CPγ                (4) All of these

Concept Questions :-

Specific heat
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The curve between absolute temperature and vrms2 is:

(a)        

(b) 

(c)          

(d) 

Concept Questions :-

Types of velocity
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Five molecules of a gas have speeds, 1, 2, 3, 4 and 5 kms-1.  The value of the root mean square speed of the gas molecules is:

(1) 3 kms-1             (2) 11kms-1

(3) 12πkms-1    (4) 3.5 kms-1

Concept Questions :-

Types of velocity
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The average velocity of an ideal gas molecule is:                                                                                                                   [OJEE 2010]

(1) proportional to T

(2) proportional to T2

(3) proportional to T3

(4) zero

Concept Questions :-

Types of velocity
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