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Chapter 11 - Heat and Thermodynamics - 5
1.
Collision among gas molecules themselves and with the walls of the container are assumed to be perfectly inelastic.
a) False
b) True
2.
It is obvious that C
p
< C
v
by an amount equal to universal gas constant R.
a) False
b) True
3.
The efficiency of carnot engine depends on the temperature of hot and cold reservoirs.
a) True
b) False
4.
The process for which entropy remains constant is a reversible process.
a) True
b) False
5.
For all irreversible process, the entropy of the universe always decreases.
a) True
b) False
6.
No heat engine can be more efficient than a carnot engine operating between the same two temperature.
a) True
b) False
7.
Temperature of a system is defined as the total K.E of its molecules.
a) False
b) True
8.
A heat engine is a device which converts a part of thermal energy into work.
a) False
b) True
9.
Change in entropy is positive when heat is added and negative when heat is removed from the system.
a) True
b) False
10.
Pressure exerted by the gas is directly proportional to the average translation K.E of the gas molecules.
a) False
b) True
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