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Engineering Thermodynamics

Engineering Thermodynamics
Which of the following has the minimum atomic mass?

Carbon
Nitrogen
Oxygen
Sulphur

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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
80°C
0°C
40°C

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Engineering Thermodynamics
The heat flows from a cold body to a hot body with the aid of an external source. This statement is given by

Gay-Lussac
Clausis
Joule
Kelvin

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Engineering Thermodynamics
Addition of heat at constant pressure to a gas results in

Raising its temperature and doing external work
Raising its temperature
Raising its volume
Raising its pressure

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Engineering Thermodynamics
A mixture of gas expands from 0.03 m3 to 0.06 m3 at a constant pressure of 1 MPa and absorbs 84 kJ of heat during the process. The change in internal energy of the mixture is

84 kJ
30 kJ
114 kJ
54 kJ

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Engineering Thermodynamics
The value of n = 1 in the polytropic process indicates it to be

Isothermal process
Irreversible process
Adiabatic process
Reversible process

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