The miscibility of ethanol with alkanes is limited to alkanes up to undecane: mixtures with dodecane and higher alkanes show a miscibility gap below a certain temperature (about 13 °C for dodecane). The miscibility gap tends to get wider with higher alkanes, and the temperature for complete miscibility increases. Ethanol-water mixtures have less volume than the sum of their individual components at the given fractions. Mixing equal volumes of ethanol and water results in only 1.92 volumes of mixture. Mixing ethanol and water is exothermic, with up to 777 J/mol being released at 298 K.
Mixtures of ethanol and water form an azeotrope at about 89 mole-% ethanol and 11 mole-% water or a mixture of 95.6 percent ethanol by mass (or about 97% alcohol by volume) at normal pressure, which boils at 351K (78 °C). This azeotropic composition is strongly temperature- and pressure-dependent and vanishes at temperatures below 303 K.

Hydrogen bonding causes pure ethanol to be hygroscopic to the extent that it readily absorbs water from the air. The polar nature of the hydroxyl group causes ethanol to dissolve many ionic compounds, notably sodium and potassium hydroxides, magnesium chloride, calcium chloride, ammonium chloride, ammonium bromide, and sodium bromide. Sodium and potassium chlorides are slightly soluble in ethanol. Because the ethanol molecule also has a nonpolar end, it will also dissolve nonpolar substances, including most essential oils and numerous flavoring, coloring, and medicinal agents. The addition of even a few percent of ethanol to water sharply reduces the surface tension of water.
Deaf-mute people in history
The Ottoman Sultans used people referred to as "congenital deaf-mutes" (called in Turkish dilsiz or bizeban, i.e. "mute" or "without tongue") in their own personal service from the 15th century to the end of the Ottoman Empire. Due to their nature, they were often entrusted with confidential and delicate missions, including executions. Deaf-muteness in art and literature
Stephen Kings novel The Stand features a main character named Nick Andros who is referred to as "deaf-mute." Though deaf people almost always have a voice, King interpreted the term literally and made Nick unable to vocalize. However, he could read lips and make himself clearly understood by pantomiming and in writing. The phrase is used in The Catcher in the Rye to indicate someone who does not speak his mind, and hears nothing, in effect becoming isolated from the world. Chief Bromden, in One Flew Over the Cuckoos Nest, is believed by all to be deaf and mute, but in fact he can hear and speak; he does not let anyone know this because, as he grew up, he was not spoken to (making him "deaf") and ignored (making him "mute"). The character Singer in the novel The Heart Is a Lonely Hunter, written in 1940, is referred to as "deaf-mute" throughout. In the classic Zorro stories, television series, etc. Zorros aid Bernardo, a mute, pretends that he can also not hear, in order to get information to aid his master in his fight for justice.