Engineering Thermodynamics
The more effective way of increasing efficiency of Carnot engine is to

Decrease higher temperature
Increase higher temperature
Increase lower temperature
Decrease lower temperature

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Engineering Thermodynamics
According to Avogadro's Hypothesis

The molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature
Product of the gas constant and the molecular weight of an ideal gas is constant
Gases have two values of specific heat
The sum of partial pressure of mixture of two gases is sum of the two

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