Textbook
questions for I P E ( with links to answers )
1.
Define
Thermal equilibrium. How does it lead to Zeroth Law
of Thermodynamics? Answer
2.
Define
Calorie. What is the relation between calorie and mechanical equivalent of
heat? Answer
3.
What
thermodynamic variables can be defined by a) Zeroth
Law b) First Law? Answer(a) Answer
(b)
4.
Define
specific heat capacity of the substance. On factors does it depend? Answer
5.
Define
molar specific heat capacity. Answer
6.
For a
solid, what is the total energy of an oscillator? Answer ( this is answered
in Kinetic theory of gases )
7.
Indicate
the graph showing the variation of specific heat of water with temperature.
What does it signify? Answer
8.
Define
state variables and equation of state.
Answer
9.
Why a
heat engine with 100% efficiency can never be realized in practice? Answer
10.
In
summer, when the valve of a bicycle tube is opened, the escaping air appears
cold. Why? Answer
11.
Why does
the brake drum of an automobile get heated up while moving down at constant
speed? Answer
12.
Can a
room be cooled by leaving the door of an electric refrigerator open? Answer
13.
Which
of the two will increase the pressure more, an adiabatic or an isothermal
process, in reducing the volume to 50%?
Answer
14.
A
thermos flask containing a liquid is shaken vigorously. What happens to its
temperature? Answer
15.
A
sound wave is sent into a gas pipe. Does its internal energy change? Answer
16.
How
much will be the internal energy change in ( i )
isothermal process ( ii ) adiabatic process
Answer
17.
The
coolant in a chemical or a nuclear plant should have high specific heat.
Why? Answer
18.
Explain
the following processes
(i) Isochoric
process (ii) Isobaric process Answer
1. State and explain first law of
thermodynamics. Answer
2. Define two principal specific
heats of a gas. Which is greater and why?
Answer
3. Derive a relation between the two
specific heat capacities of gas on the basis of first law of
thermodynamics. Answer
4. Obtain an expression for the work
done by an ideal gas during isothermal change. Answer
5. Obtain an expression for the work
done by an ideal gas during adiabatic change and explain. Answer
6. Compare isothermal and an
adiabatic process. Answer
7. Explain the following processes ( i ) Cyclic process with example ( ii ) Non cyclic process
with example Answer
8. Write a short note on Quasi-static
process. Answer
9. Explain qualitatively the working
of a heat engine. Answer
Long Answer Questions
1. Explain reversible and
irreversible processes. Describe the working of Carnot engine. Obtain an
expression for the efficiency. Answer(a) Answer(b)
2. State second law of
thermodynamics. How is heat engine different from a refrigerator? Answer Part
I Part
II Part
III