If a substance goes though a cycle of changes returning back to original state, the change in entropy is
A) positive
B) negative
C) zero
D) positive or negative depending upon originalstate
Correct Answer:
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Q8: 1.6 Kg of air is expanded at
Q9: Entropy at absolute zero temperature is zero
Q10: The third law of thermodynamics
A)defines entropy
B)provides a
Q11: Entropy is called the property of a
Q12: Entropy of mixture of two gases after
Q14: A sequence of operations which a gas
Q15: In a reversible process
A)heat transfer takes place
Q16: Which of the following processes is very
Q17: A perfect gas having p1= 0.1 M/mm²,
Q18: The enthalpy of a system
A)i= internal energy
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