77. Which of the following is the correct statement of the second law of thermodynamics?
78. The heating and expanding of a gas is called thermodynamic system.
79. Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle
80. Liquid fuels have higher calorific value than solid fuels.
81. The free expansion process is __________ non-flow process.
82. A mixture of gas expands from 0.03 m3 to 0.06 m3 at a constant pressure of 1 MPa and absorbs 84 kJ of heat during the process. The change in internal energy of the mixture is
83. The gas constant (R) is equal to the __________ of two specific heats.
84. Hydrogen is the __________ substance.
85. Otto cycle is also known as
86. For a perfect gas, according to Boyle's law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)
87. Producer gas is obtained by
88. The efficiency of a dual combustion cycle __________ upon cut-off ratio.
89. The efficiency of Diesel cycle depends upon
90. Those substances which have so far not been resolved by any means into other substances of simpler form are called
91. The measurement of a thermodynamic property known as temperature is based on
92. Kelvin-Planck's law deals with
93. For the same compression ratio, the efficiency of dual combustion cycle is
94. In an irreversible process, there is a
95. The amount of heat required to raise the temperature of unit mass of a gas through one degree at constant pressure is called specific heat at constant pressure.
96. The change of entropy, when heat is removed from the gas, is negative.
97. Coke is produced
98. One Joule (J) is equal to
99. When the expansion or compression takes place according to the law pvn = C, the process is known as
100. The entropy is a point function and thus it is a property of the same.