HC Verma - Concepts of Physics Part 2

Book: HC Verma - Concepts of Physics Part 2

Chapter: 27. Specific Heat Capacities of Gases

Subject: Physics - Class 12th

Q. No. 6 of Objective II

Listen NCERT Audio Books to boost your productivity and retention power by 2X.

6

A rigid container of negligible heat capacity contains one mole of an ideal gas. The temperature of the gas increases by 1°C it 3.0 cal of heat is added to it. The gas may be

Let us use the formula,


Heat supplied to a gas, dQ = nCvdT.


Where,


n is the number of mole of the ags


Cv is the specific heat of the gas at constant volume T is the temperature


Putting the values in the above formula, we get


dQ = 3.0 cal = (3.0 x 4.2)J = 12.6 J.


dT = 1°C, n = 1.


Therefore, Cv is approximately equal to 12.6 J/mol/°C ~ 1.5R = 3R/2


We know,


Where Cp = specific heat at constant pressure


R = universal gas constant = 8.314 J/kg/mol


which holds for monoatomic gases.


Helium and Argon are monoatomic and so options (a) and (b) hold.

Chapter Exercises

Short Answer
Objective I
Objective II
Exercises

More Exercise Questions

1

A gas kept in a container of finite conductivity is suddenly compressed. The process
2

Let Q and W denote the amount of heat given to an ideal gas and the work done by it in an isothermal process.
3

Let Q and W denote the amount of heat given to an ideal gas and the work done by it in an adiabatic process.
4

Consider the processes A and B shown in figure. It is possible that
5

Three identical adiabatic containers A, B and C contain helium, neon and oxygen respectively at equal pressure. The gases are pushed to half their original volumes.
6

A rigid container of negligible heat capacity contains one mole of an ideal gas. The temperature of the gas increases by 1°C it 3.0 cal of heat is added to it. The gas may be
7

Four cylinders contain equal number of moles of argon, hydrogen, nitrogen and carbon dioxide at the same temperature. The energy is minimum in

Students Store