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.Management Sciences
Category: Thermodynamics for Chemical
Work done in case of free expansion is____________________?
A. Indeterminate
B. Zero
C. Negative
D. None of these
Lenz’s law results from the law of conservation of___________________?
A. Mass
B. Momentum
C. Energy
D. None of these
The freezing point of a liquid decreases when the pressure is increased, if the liquid ____________ while freezing?
A. Contracts
B. Expands
C. Does not change in volume
D. Either (A), B. or (C)
When dilute aqueous solutions of two salts are mixed, the process is associated with ___________________?
A. Decrease in temperature
B. Increase in temperature
C. No change in temperature
D. Change in temperature which is a function of composition
The unit of fugacity is the same as that of the_________________?
A. Pressure
B. Temperature
C. Volume
D. Molar concentration
Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is – 57°C and 5.2 atm) ?
A. Pressure must be kept below 5.2 atm
B. Temperature must be kept above – 57°C
C. Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C
D. Pressure and temperature must be kept below 5.2 atm. and – 57°C respectively
If atmospheric temperature and dew point are nearly equal, then the relative humidity is_______________?
A. Zero
B. 50%
C. Almost 100%
D. unpredictable
Pick out the correct statement ?
A. Entropy and enthalpy are path functions
B. In a closed system, the energy can be exchanged with the surrounding, while matter cannot be
exchanged
C. All the natural processes are reversible in nature
D. Work is a state function
Pick out the correct statement?
A. If an insoluble gas is passed through a volatile liquid placed in a perfectly insulated container,
the temperature of the liquid will increase
B. A process is irreversible as long as Δ S for the system is greater than zero
C. The mechanical work done by a system is always equal to∫P.dV
D. The heat of formation of a compound is defined as the heat of reaction leading to the
formation of the compound from its reactants
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