Which among the following are true about the activation barrier of homogeneous and heterogeneous nucleation?

ΔG(hom) is always a constant but ΔG(het) varies with temperature

Which among the following are true about the activation barrier of ho

1.	Which among the following are true about the activation barrier of homogeneous and heterogeneous nucleation?
A.	ΔG(hom) > ΔG(het)
B.	ΔG(hom) << ΔG(het)
C.	ΔG(hom) is always a constant but ΔG(het) varies with temperature
D.	Nothing can be predicted
Answer» E.

Discussion

No Comment Found

Related MCQs

Which among the following are true about the activation barrier of homogeneous and heterogeneous nucleation?
In some metallic systems the liquid can be rapidly cooled to temperatures below the so-called glass transition temperature without the formation of crystalline solid.
Value of shape factor of heterogeneous nucleation if Θ is given as 60°?
Calculate the value of ΔGv if the interfacial energy is given as 3kJ/mm2Kmol and the critical radius is given as 1.5mm?
If the liquid contains x atoms per unit volume, calculate the number of clusters that have reached the critical size (Y), if the temperature is taken at T (K) and the critical value of change in free energy at homogenous nucleation is given as ΔG’?
Calculate the critical radius, if the interface energy is given as 3kJ/m2Kmol and the undercooling is given as 300K (ΔT)? (Assume the latent heat of fusion per unit volume as L and the melting point temperature (Tm) as 150K).
Calculate the ΔG’ (critical) if the ΔGv and γ values are given as √Π kJ/m3Kmol and 3kJ/m2Kmol respectively? (Homogenous nucleation)
Calculate the critical radius if the ΔGv and γ values are given as 5 kJ/m3Kmol and 2.5 kJ/m2Kmol respectively? (Homogeneous nucleation)
For a given undercooling there is a certain radius r*, which is associated with a maximum excess free energy. If r< r* the system can lower its free energy by_____
Calculate the volume free energy associated with homogenous nucleation of sphere if the radius of the sphere is given as 5m and the ΔGv is given as (3/п) kJ/m3Kmol?

Which among the following are true about the activation barrier of homogeneous and heterogeneous nucleation?

Discussion

No Comment Found

Related MCQs

Reply to Comment