A solid is transformed into vapour without going to the liquid phase at_________________?

Related Mcqs:

Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The ratio of chemical potential to free energy of a pure substance at constant temperature and pressure is________________?

A. 0 B. 1 C. ∞ D. None of these...

For a reversible process involving only pressure-volume work____________________?

A. (dF)T, p 0 C. (dF)T, p = 0 D. (dA)T, v < 0...

“When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change.” This is called the_______________?

A. Le-Chatelier principle B. Kopp’s rule C. Law of corresponding state D. Arrhenius hypothesis...

Air-refrigeration cycle________________?

A. Is the most efficient of all refrigeration cycles B. Has very low efficiency C. Requires relatively large quantities of air to achieve a significant amount of refrigeration D. Both B. and C...

Pick out the wrong statement?

A. The net change in entropy in any reversible cycle is always zero B. The entropy of the system as a whole in an irreversible process increases C. The entropy of the universe tends to a maximum D. The entropy of a substance does not remain constant during a reversible adiabatic change...