Metallurgical Thermodynamics Quiz-1

B : Temperature
Extensive properties are those which depends on the mass of the substances .Temperature is not Extensive property whhich does not depend on mass of the substance..

A : A = U – TS
A = U – TS expression shows the helmholtz free energy functio

A : zeroth law of thermodynamics
The zeroth law of thermodynamics states that if two thermodynamic systems are each in thermal equilibrium with a third, then they are in thermal equilibrium with each other..

B : P ∝ 1/V
Boyle’s law is valid for constant Temperature..

C : ΔS = -ve
for non spontaneous reactions ΔS is negative and ΔG is positive

A : Selective leaching
Dezincification selectively removes zinc from the alloy, leaving behind a porous, copper-rich structure that has little mechanical strength..

C : F = C – P + 2
Gibbs' Phase Rule provides the theoretical foundation, based in thermodynamics, for characterizing the chemical state of a system, and predicting the equilibrium relations of the phases present as a function of physical conditions such as pressure and temperature..

C : 0

A : Cp = Cv

C : ΔT = 0
An isothermal process is a change of a system, in which the temperature remains constant: ΔT = 0..