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.Management Sciences
Category: Thermodynamics for Chemical
For spontaneous changes in an isolated system (S = entropy) ___________________?
0
A. ds = 0
B. ds <0
C. ds > 0
D. ds = Constant
A gas performs the maximum work, when it expands___________________?
A. Non-uniformly
B. Adiabatically
C. Isobarically
D. Isothermally
Enthalpy changes over a constant pressure path are always zero for ______________ gas?
A. Any
B. A perfect
C. An easily liquefiable
D. A real
Which of the following has the least thermal efficiency ?
A. Steam engine
B. Carnot engine
C. Diesel engine
D. Otto engine
Heating of water under atmospheric pressure is an ______________ process?
A. Isochoric
B. Isobaric
C. Adiabatic
D. Isothermal
“If different processes are used to bring about the same chemical reaction, the enthalpy change is same for all of them”. This is ______________ law?
A. Hess’s
B. Kirchoff’s
C. Lavoisier and Laplace
D. None of these
The amount of heat required to decompose a compound into its elements is _____________ the heat of formation of that compound from its elements?
A. Less than
B. More than
C. Same as
D. Not related to
Pick out the wrong statement ?
A. The expansion of a gas in vacuum is an irreversible process
B. An isometric process is a constant pressure process
C. Entropy change for a reversible adiabatic process is zero
D. Free energy change for a spontaneous process is negative
The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the _____________ equation?
A. Gibbs-Duhem
B. Van Laar
C. Gibbs-Helmholtz
D. Margules
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