A. Isolated
B. Open
C. Insulated
D. Closed
Related Mcqs:
- 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?
A. Bomb
B. Separating
C. Bucket
D. Throttling - Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a _______________ calorimeter ?
A. Bomb
B. Throttling
C. Junker’s
D. Boy’s - Gibbs free energy (G) is represented by, G = H – TS, whereas Helmholtz free energy, A. is given by, A = E – TS. Which of the following is the Gibbs-Helmholtz equation ?
A. [∂(G/T)/∂T] = – (H/T2)
B. [∂(A/T)/∂T]V = – E/T2
C. Both A. and B.
D. Neither A. nor B. - Total energy at a point comprises of _____________ energy?
A. Potential & kinetic
B. Pressure
C. Internal
D. All A., B. & C. - The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the_________________?
A. Ionosphere
B. Troposphere
C. Stratosphere
D. None of these - Enthalpy change resulting, when unit mass of solid is wetted with sufficient liquid, so that further addition of liquid produces no additional thermal effect, is called the heat of________________?
A. Mixing
B. Adsorption
C. Wetting
D. Complete wetting - For an ideal gas, the internal energy depends upon its ____________ only?
A. Molecular size
B. Temperature
C. Volume
D. Pressure - Internal energy of an element at 1 atm and 25° C is ____________ kcal/kg.mole?
A. 0
B. 273
C. 25
D. None of these - The chemical potential for a pure substance is ____________ its partial molal free energy?
A. More than
B. Less than
C. Equal to
D. Not related to - An isolated system can exchange ______________ with its surroundings?
A. Matter
B. Energy
C. Neither matter nor energy
D. Both matter and energy
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