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Engineering Thermodynamics

Engineering Thermodynamics
Superheated vapour behaves

As steam
Approximately as a gas
Exactly as gas
As ordinary vapour

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Engineering Thermodynamics
The polytropic index (n) is given by

log (p2/ p1)/log (v1/ v2)
log [(p1v1)/(p2v2)]
log (v1/ v2)/ log (p1/p2)
log (p1p2)/log (v1v2)

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Engineering Thermodynamics
For which of the following substances, the internal energy and enthalpy are the functions of temperature only

Perfect gas
Water
Any gas
Saturated steam

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Engineering Thermodynamics
Which of the following is the property of a system?

Volume and density
Enthalpy and entropy
All of these
Pressure and temperature

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Engineering Thermodynamics
The area under the temperature-entropy curve (T – s curve) of any thermodynamic process represents

Heat rejected
Heat absorbed
Either heat absorbed or heat rejected
None of the listed here

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Engineering Thermodynamics
If a certain amount of dry ice is mixed with same amount of water at 80°C, the final temperature of mixture will be

20°C
0°C
80°C
40°C

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