Spontaneity

Which of the following transition leads to greater disorder in universe (System + Surroundings)?

For a spontaneous process,
 

Matching Type Question

Which of the following processes is nonspontaneous?

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

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

A change that can occur on its own is called

For the reaction at 298 K, 2A + B $\to$ C. $∆$H
= 400 kJ mol^–1 and $\to$ S = 0.2 kJ mol^–1 K^–1.

The reaction will become spontaneous above______ K.

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 is correct for spontaneity of an electrochemical cell?

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

Which of the following conditions regarding the chemical process ensures its spontaneity at all temperatures?

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

What will be the value of $\mathrm{\Delta }G$ for ice at $8^{o}C$ temperature?

Consider the following reaction occurring in an automobile

$2{\mathrm{C}}_8{\mathrm{H}}_{18}\left(\mathrm{g}\right)+25{\mathrm{O}}_2\left(\mathrm{g}\right)⟶16\mathrm{C}{\mathrm{O}}_2\left(\mathrm{g}\right)+18{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)$

The sign of $∆\mathrm{H},\mathrm{ }∆\mathrm{S}$ and $∆\mathrm{G}$ would 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?