Question

Assignment on problems

Kinetic theory

1) Find the kinetic energy of one mole of argon gas at 1270

c ( R = 8.31 )

2) Find the ratio of rms speed of oxygen molecule to that of sulphur dioxide

molecule

( Atomic mass of sulphur = 32 g . Atomic mass of oxygen = 16 g )

3) Calculate the temperature at which rms speed of gas molecules is

double of its speed at 270

c, pressure remaining constant.

4) Calculate the temperature at which rms speed of nitrogen molecules will

be equal to 8 km/s

( R = 8.31 . molecular mass of nitrogen = 28 )

5) Find the temperature at which rms speed of a gas is half its value at 00

c,

pressure remaining constant

Thermal properties of matter

1) A sheet of brass of 40 cm long and 8 cm breadth is at 0

0

c . If the

surface area at 100

0

c is 320.1 cm2 , calculate the coefficient of linear

expansion of brass

2) A Copper block of mass 2.5 kg is heated to a temperature of 5000

c

and then placed on a large ice block. What is the maximum amount

of ice that can melt ?

( specific heat capacity of copper = 0.39 J/g 0

c; latent heat of fusion

of ice = 335 J/g )

3) At what temperature is the Fahrenheit scale reading equal to twice

of Celsius scale?

4) At what temperature is Celsius scale and Fahrenheit scale becomes

equal

5) A circular hole of radius 1 cm in a brass sheet is kept at 293 K. What

will be the diameter of this hole when the sheet is heated to 393 K. (

Given α for brass = 20 × 10-6 K

-1

)

6) A body cools from 700 c to 400

c in 10 minutes .How much time will it

take to cool from 600

c to 350

c. Temperature of the surroundings is

100​

Answer 1

Answer:

ENERGY GAINED BY THE REASON OF ITS MOTION IS KINETIC ENERGY. THE FORMULA FOR KINETIC ENERGY IS=1/2MV²