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Engineering Thermodynamics

Engineering Thermodynamics
The heat and mechanical energies are mutually convertible. This statement was established by

Joule
Boyle
None of these
Charles

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Engineering Thermodynamics
The isothermal and adiabatic processes are regarded as

Irreversible process
None of the listed here
Reversible or irreversible process
Reversible process

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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

30 kJ
114 kJ
84 kJ
54 kJ

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Engineering Thermodynamics
On volume basis, air contains following parts of oxygen

25
23
21
77

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Engineering Thermodynamics
Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant

Pressure
Internal energy
Temperature
Volume

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Engineering Thermodynamics
In an isothermal process

All of the listed here
There is no change in temperature
There is no change in internal energy
There is no change in enthalpy

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