###### Equilibrium

In system $$A+B\leftrightarrow C$$, $$\boldsymbol{\Delta}H$$°$$<0$$ where A, B and C - gases the balance is established.. What is the impact on equilibrium concentration of substance C if concentration of substance A is increasing?

Increasing the concentration of substance A will shift the equilibrium towards the formation of product C, e.g. [C] will grow.

###### Equilibrium

In system $$A + B \leftrightarrow C$$, $$\Delta H$$°$$<0$$ where A, B and C – gases the balance is established. What is the impact on equilibrium if the temperature increases?

Since $$\Delta H$$°$$<0$$, heat is released, the reaction - exothermic. The reversible reaction is bound to be endothermic. An increase in temperature always favors the reaction to proceed with the absorption of heat, i.e., the equilibrium shifts to the compounds A and B and, therefore, [C] is reduced.

###### Equilibrium

Chemical equilibrium in the system $$2NO_{2(g)} \leftrightarrow 2NO_{(g)} + O_{2(g)}$$ will move towards a direct reaction if

In accordance with the Le Chatelier principle the increase of pressure (or the increase of temperature) will lead to an equilibrium shift towards a direct reaction.

###### Equilibrium

What factors do not affect the equilibrium of a reversible reaction shift?

###### Equilibrium

Chemical equilibrium in the system $$N_{2(g)} + O_{2(g)} \to 2NO_{(g)} -Q$$  is not shifted, if:

The pressure depends on the quantity of the gaseous substances in the system. We calculate the volume of gaseous substances in the left and right sides of the equation (for coefficients). Thus, the pressure does not affect the shift of chemical equilibrium.

###### Equilibrium

What factor does not influence the equilibrium of the chemical reaction: $$N_2 + 3H_2 \leftrightarrow 2NH_3 + Q$$?

The use of the catalyst does not influence the equilibrium of the chemical reaction:$$N_2 + 3H_2 \leftrightarrow 2NH_3 + Q$$

###### Equilibrium

The state of chemical equilibrium in the system: $$2SO_2 + O_2 \leftrightarrow 2SO_3 + Q$$ is not affected by.

The state of chemical equilibrium in the system: $$2SO_2 + O_2 \leftrightarrow 2SO_3 + Q$$ is not affected by the catalyst.

###### Equilibrium

In the system  $$Fe_2O_{3(s)} + 3CO_{(g)} \leftrightarrow 2Fe_{(s)} + 3CO_{2(g)} + Q$$ does not affect the offset of chemical equilibrium.

In the system  $$Fe_2O_{3(s)} + 3CO_{(g)} \leftrightarrow 2Fe_{(s)} + 3CO_{2(g)} + Q$$ increasing the pressure does not affect of the offset of the chemical equilibrium.

###### Equilibrium

What allows us to shift the equilibrium in the direction of formation of HBr in the system $$H_{2(g)} + Br_{2(g)} \leftrightarrow 2HBr_{(g)} + 68 kJ$$

Decreasing the temperature and increasing the concentration of $$H_2$$ allow us to shift the equilibrium in the direction of formation of $$HBr$$.

###### Equilibrium

The reaction $$A_{ (g)} + B_{(g)} = C_{(g)} + 105 kJ$$ under certain conditions is reversible. What is the impact on the equilibrium state of the system if we increase the temperature?

As the temperature increases equilibrium will be shifted in the direction of the reverse reaction (endothermic).