Calculate the value of log `K_p` for the reaction: `N_2(g) + 3H_2(g) iff 2NH_3(g)` at `25^@C`. The standard enthalpy of formation of `NH_3(g)` is -46 kJ and standard entropies of `N_2, H_2 `and `NH_3` gases are 191, 130, 192 `JK^(-1) "mol"^(-1)` respectively.

Explanation

To calculate the value of log Kp for the reaction \( N_2(g) + 3H_2(g) \iff 2NH_3(g) \) at \( 25^\circ C \), we will follow these steps:

### Step 1: Calculate the Standard Enthalpy Change (ΔH°) for the Reaction
The standard enthalpy change for the reaction can be calculated using the standard enthalpy of formation of the products and reactants.

\[ \Delta H^\circ = \sum \Delta H_f^\circ \text{(products)} - \sum \Delta H_f^\circ \text{(reactants)} \]
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