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The table shown here lists the ion-product constant $\left(K_{\mathrm{w}}\right)$ of water at several temperatures. Determine graphically the $\Delta H^{\circ}$ for the ionization of water.$\begin{array}{llllll}K_{\mathrm{w}} & 0.113 \times & 0.292 \times & 1.008 \times & 2.917 \times & 5.474 \times\end{array}$$\begin{array}{lllll}10^{-14} & 10^{-14} & 10^{-14} & 10^{-14} & 10^{-14}\end{array}$$t\left(^{\circ} \mathrm{C}\right)$ $\begin {array} {lllll}0&10&25&40&0 \end{array}$

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$\Delta H^{0}$ is $57 \mathrm{kJ} / \mathrm{mol}$

Chemistry 102

Chapter 17

Entropy, Free Energy, and Equilibrium

Thermodynamics

University of Central Florida

Rice University

University of Kentucky

Lectures

00:42

In thermodynamics, the zeroth law of thermodynamics states that if two systems are in thermal equilibrium with a third system, they are also in thermal equilibrium with each other.

01:47

A spontaneous process is one in which the total entropy of the universe increases. In a spontaneous process, the system will move from an ordered state to a disordered state, such as from ice to water, or from a solid to a gas. The concept of spontaneity was introduced by Rudolf Clausius in 1850.

01:36

The ionization constant fo…

04:58

01:39

At room temperature, the e…

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