Spontaneity

For a spontaneous process,
 

Which of the following reaction is expected never to be spontaneous?

Which of the following processes is nonspontaneous?

Is heat transfer from ice to room at $25°\mathrm{C}$ spontaneous?

Is flow of heat from cold object to hot object spontaneous?

Is spreading of fragrance when a bottle of perfume is opened, spontaneous?

Is separation of $\mathrm{Ar}$ and $\mathrm{Kr}$ from their mixture, spontaneous? 

Is dissolution of sugar in hot coffee spontaneous?

What is spontaneous process? Give examples.

A change that can occur on its own is called

Cotyledons are also called-

For a given reaction, $\mathrm{\Delta H} =35.5 \mathrm{kJ} {\mathrm{mol}}^{-1}$ and $\mathrm{\Delta S} = 83.6 {\mathrm{JK}}^{-1}{\mathrm{mol}}^{-1}$. The reaction is spontaneous at (Assume that $\mathrm{\Delta }\mathrm{H}$ and $\mathrm{\Delta }\mathrm{S}$ do not vary with temperature):

Which of the following processes is a non-spontaneous process?

In which of the following reactions, standard reaction entropy change $\left({\mathrm{\Delta S}}^{\mathrm{o}}\right)$ is positive and standard Gibb's energy change $\left({\mathrm{\Delta G}}^{\mathrm{o}}\right)$ decreases sharply with increasing temperature?

The factor of $\mathrm{\Delta }G$ values is important in metallurgy. The $\mathrm{\Delta }G$ values for the following reactions at ${800}^{o}C$ are given as:

$S_2\left(g\right)+2O_2\left(g\right)\to 2S{O}_2\left(g\right); \mathrm{\Delta }G= -544 kJ$

$2Zn\left(s\right)+S_2\left(g\right)\to 2ZnS\left(s\right); \mathrm{\Delta }G=-293 kJ$

$2Zn\left(s\right)+O_2\left(g\right)\to 2ZnO\left(s\right); \mathrm{\Delta }G=-480 kJ$

The $\mathrm{\Delta }G$ for the reaction,

$2ZnS\left(g\right)+3O_2\left(g\right)\to 2ZnO\left(g\right)+2S{O}_2\left(g\right)$ ;  will be

In an irreversible process taking place at constant T and P and in which only pressure volume work is being done, the change in Gibb's free energy $\left(∆\mathrm{G}\right)$ and change in entropy $\left(∆\mathrm{S}\right)$ , satisfy the criteria

Which reaction either endothermic or exothermic characteristics has the greater chance of occuring spontaneously?

For a reaction $\mathrm{\Delta }\mathrm{H}=-9.08\mathrm{ }\mathrm{k}\mathrm{J}\mathrm{ }\mathrm{m}\mathrm{o}{\mathrm{l}}^{-1}$ and

$\mathrm{\Delta }\mathrm{S}=35.7\mathrm{ }\mathrm{J}{\mathrm{K}}^{-1}\mathrm{m}\mathrm{o}{\mathrm{l}}^{-1}$

Which of the following statements is correct for the reaction?

If a process is both endothermic and spontaneous , then :

Considering entropy $\left(∆\mathrm{S}\right)$ as a thermodynamic parameter, the criterion for the spontaneity of any process is