Q21.136 CP - Chemistry: Molecular Nature Of Matter And Change

Question

You are investigating a particular chemical reaction. State all the types of data available in standard tables that enable you to calculate the equilibrium constant for the reaction at $\mathbf{\text{298}}$  K.

Step-by-Step Solution

Answer

The types of data available to enable evaluate the equilibrium constant for the reaction are obtained as:  $∆{\text{H}}^{\text{o}},∆{\text{G}}^{\text{o}}{\text{,∆ E}}_{cell}^0{\text{ and∆S}}^{\text{o}}$

Step 1: Define chemical reaction

Chemical synthesis or, alternatively, chemical breakdown into two or more separate chemicals occurs when one component interacts with another to generate new material. These processes are known as chemical reactions, and they are generally irreversible until followed by other chemical reactions.

Step 2: Stating all the types of data available

The following reactions can be used to get the equilibrium constant:

 $\begin{array}{rcl}& & ∆{\text{G}}^{\text{o}}\text{ = - nF}{{\text{E}}^{\text{o}}}_{\text{cell}}\\ & & \text{ = - RTlnK}\\ & & ∆{\text{G}}^{\text{o}}{\text{ = ∆H}}^{\text{o}}{\text{ - T∆S}}^{\text{o}}\\ & & \text{ = RTlnK}\\ & & \\ & & \end{array}$

The equilibrium constant at  298 K may be calculated using the variables  $∆{\text{H}}^{\text{o}},∆{\text{G}}^{\text{o}}{\text{,∆ E}}_{cell}^0{\text{ and∆S}}^{\text{o}}$.

Therefore, we get: $∆{\text{H}}^{\text{o}},∆{\text{G}}^{\text{o}}{\text{,∆ E}}_{cell}^0{\text{ and∆S}}^{\text{o}}$