A. ds = 0
B. ds <0
C. ds > 0
D. ds = Constant
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Related Mcqs:
- 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_______________?
- A. Superheated vapour B. Partially condensed vapour with quality of 0.9 C. Saturated vapour D. Partially condensed vapour with quality of 0.1...
- A change in state involving a decrease in entropy can be spontaneous, only if ____________________?
- A. It is exothermic B. It is isenthalpic C. It takes place isothermally D. It takes place at constant volume...
- Entropy change for an irreversible isolated system is__________________?
- A. ∞ B. 0 C. < 0 D. > 0...
- A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S1 and Δ SR are the entropy changes of the system for the irreversible and reversible processes respectively) ?
- A. Δ S1 is always Δ SR C. Δ S1 is always > Δ SR D. Δ S1 is always = Δ SR...
- For a spontaneous process, free energy__________________?
- A. Is zero B. Increases C. Decreases whereas the entropy increases D. And entropy both decrease...
- In any spontaneous process, ?
- A. Only F decreases B. Only A decreases C. Both F and A decreases D. Both F and A increase...
- In any spontaneous process, the ______________ free energy decreases ?
- A. Helmholtz B. Gibbs C. Both A. & B. D. Neither A. nor B....
- _____________ law of thermodynamics ascertains the direction of a particular spontaneous process?
- A. Zeroth B. First C. Second D. Third...
- For equilibrium process (i.e. reversible) in an isolated system __________________?
- A. ds = 0 B. ds 0 D. ds = Constant...
- 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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