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Chemical Engineering Thermodynamics

Chemical Engineering Thermodynamics
Sublimation temperature of dry ice (solid CO₂) is __________ °C.

0
-273
5
-78

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Chemical Engineering Thermodynamics
Number of degrees of freedom for a three phase system in equilibrium comprising of three non-reacting chemical species is

1
2
3

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Chemical Engineering Thermodynamics
Compound having large heat of formation is

Less stable
Either more or less stable ; depends on the compound
Not at all stable (like nascent O₂)
More stable

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Chemical Engineering Thermodynamics
Trouton's ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K )

Tb/λb
√(λb/Tb)
√(Tb/λb)
λb/Tb

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Chemical Engineering Thermodynamics
Normal temperature and pressure (N.T.P.) corresponds to

15°C and 760 mm Hg
20°C and 760 mm Hg
0°C and 1 kgf/cm²
0°C and 760 mm Hg

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Chemical Engineering Thermodynamics
For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system __________ as its mole fraction increases.

Remains same
Increases
Decreases linearly
Decreases

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