For spontaneous changes in an isolated system (S = entropy) ___________________?

Related Mcqs:

Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is_____________________?

A. Positive B. Negative C. Zero D. Infinity...

The adiabatic throttling process of a perfect gas is one of constant enthalpy_________________?

A. In which there is a temperature drop B. Which is exemplified by a non-steady flow expansion C. Which can be performed in a pipe with a constriction D. In which there is an increase in temperature...

Efficiency of a heat engine working on Carnot cycle between two temperature levels depends upon the__________________?

A. Two temperatures only B. Pressure of working fluid C. Mass of the working fluid D. Mass and pressure both of the working fluid...

In the equation PVn = constant, if the value of n = y = Cp/Cv, then it represents a reversible ______________ process?

A. Isothermal B. Adiabatic C. Isentropic D. Polytropic...

Ideal refrigeration cycle is____________________?

A. Same as Carnot cycle B. Same as reverse Carnot cycle C. Dependent on the refrigerant’s properties D. The least efficient of all refrigeration processes...