71. Specific __________ does not change during phase change at constant temperature and pressure.
72. Tea kept in a thermos flask is vigorously shaken. If the tea is considered as a system, then its temperature will
73. Which of the following is an extensive property of a system?
74. The expression for entropy change, ΔS = nCp.ln$$\left( {\frac{{{{\text{T}}_2}}}{{{{\text{T}}_1}}}} \right),$$ is valid for the __________ of a substance.
75. When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change. This is called the
76. Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture __________ calorimeter is not used for measuring the dryness fraction of steam.
77. Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg.K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg.K, entropy of saturated vapour = 7.2234 kJ/kg.K) The exit condition of steam is
78. The extensive properties are
79. The intensive properties are
80. Which of the following has the least thermal efficiency?
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