Chapter 18, Problem 18.19P

Interpretation Introduction

Interpretation:

The vapor pressure of water at $\text{25 }°\text{C}$ is to be calculated.

Concept introduction:

The expression to evaluate $\text{ΔH}°$ is given by the equation as follows:

$\text{ln}\frac{K_{\text{1}}}{K_2}\text{=}\frac{\text{Δ}H°}{R}\left(\frac{1}{T_2}-\frac{1}{T_1}\right)$

Where,

• $K_{\text{1}}$ represents equilibrium constant at $T_1$.
• $K_2$ denotesequilibrium constant at $T_2$.
• $\text{Δ}H°$ denotes standard enthalpy.
• $R$ denotes gas constant.
• $T$ denotes temperature.