KINETIC THEORY OF GASES
[ONLINE QUESTIONS]
- N moles of a diatomic gas in a cylinder are at
a temperature T. Heat is supplied to the
cylinder such that temperature remains
constant but n moles of the diatomic gas get
converted into monoatomic gas. What is the
change in the total kinetic energy of the gas?
[2017]
(a)1
2nRT (b) 0 (c)^3
2nRT (d)^5
2nRT- An ideal gas has molecules with 5 degrees of
freedom. The ratio of specific heats at constant
pressure ( )Cp and at constant volume ( )CV
is: [2017]
(a) 6 (b)7
2(c)5
2(d)7
5- In an ideal gas at temperature T, the average
force that a molecule applies on the walls of a
closed container depends on T as T .q A good
estimate for q is: [2015]
(a)1
2(b) 2 (c) 1 (d)1
4- Using equipartition of energy, the specific heat
(in J kg K ^11 ) of aluminium at room
temperature can be estimated to be (atomic
weight of aluminium =27) [2015]
(a) 410 (b) 25 (c) 1850 (d) 925
5. A gas molecule of mass M at the surface of
the Earth has kinetic energy equivalent to 0 .C
If it were to go up straight without colliding
with any other molecules, how high it would
rise? Assume that the height attained is much
less than radius of the earth. (kB is Boltzmann
constant). [2014]
(a) 0 (b)273
2kB
Mg (c)546
3kB
Mg (d)KINETIC THEORY OF GASES
[ONLINE QUESTIONS]
[2017]2.[2017]3.[2015]4.[2015]5.[2014]6.[2014]7.[2014]8.[2013]819
2kB
Mg- At room temperature a diatomic gas is found
to have an r.m.s speed of 1930 ms^1. The gas is
[2014]
(a) H 2 (b) Cl 2 (c) O 2 (d) F 2 - Modern vaccum pumps can evacuate a vessel
down to a pressure of 4.0 10 ^15 atm. At room
temperat (300K). Taking R8.0JK mole ^11 ,
and NAvogadro 6 10^23 mole^1 , the mean
distance between molecules of gas in an
evacuated vessel will be of the order of:
[2014]
(a) 0.2m (b) 0.2 mm
(c) 0.2 cm (d) 0.2 nm- In the isothermal expansion of 10g of gas from
volume V to 2V the work done by the gas is
575J. What is the root mean square speed of
the molecules of the gas at that temperature?
[2013]