Thermodynamics ...

$$\Delta { G }^{ o }$$ of the cell reaction $$AgCl(s)+\cfrac { 1 }{ 2 } { H }_{ 2 }(g)=Ag(s)+{ H }^{ + }+{ Cl }^{ - }$$ is $$-21.52kJ$$. $$\Delta { G }^{ o }$$ of
$$2AgCl(s)+{ H }_{ 2 }(g)=2Ag(s)+2{ H }^{ + }+2{ Cl }^{ - }$$

In which case is a reaction impossible at any temperature?

The equilibrium partial pressure of $$N_2, H_2$$ and $$NH_3$$ are $$4, 4$$ and $$8$$ atm respectively. The value of $$K_p$$ for the Haber's process in $$atm^{-1}$$ is:

For the expression : $$dG = Vdp - SdT,$$ which of the following is correct?

The Gibbs energy for decomposition of $$Al_2O_3$$ at $$500^oC$$ is as follows:
$$\dfrac {2}{3}Al_2O_3\to \dfrac {4}{3}Al+O_2$$; $$\quad \Delta G=+966\ kJ$$
The potential difference needed for electrolysis reduction of $$Al_2O_3$$ at $$500^oC$$ is at least 

For the change $$H_2O(s), (273  K, 2 atm) \rightarrow H_2O(l), (273 K, 2 atm)$$, choose the correct option.

Hess law is based on: 

In a thermodynamic system working subtance is ideal gas, its internal energy is in the from of

For the reaction, $$A_{\left ( s \right )}+3B_{\left ( g \right )}\rightarrow 4C_{\left ( s \right )}+D_{\left ( l \right )}$$.
$$\Delta H$$ and $$\Delta U$$ are related as: