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Engineering Thermodynamics

Engineering Thermodynamics
The kinetic energy per kg molecule of any gas at absolute temperature T is equal to (where Ru = Universal gas constant)

Ru × T
3 Ru × T
2 Ru × T
1.5 Ru × T

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Engineering Thermodynamics
The oxygen atom is ________ times heavier than the hydrogen atom.

16
2
32
8

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Engineering Thermodynamics
General gas equation is

PV = C
PV=KiRT
PV=nRT
PV=mRT

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Engineering Thermodynamics
A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is

+60 kJ
-140 kJ
-80 kJ
-40 kJ

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Engineering Thermodynamics
When the gas is heated at constant volume, the heat supplied

Both (A) and (B)
Does some external work during expansion
None of these
Increases the internal energy of the gas and increases the temperature of the gas

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Engineering Thermodynamics
The atomic mass of oxygen is

18
14
16
121

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