The Etymology of Slang Sexual Terms. The word horny sexually excited, lecherous derives from an interesting yet not surprising source. As early as the mid-18th century, an erection was known as a horn or the horn, simply because it looked a bit like one.James Joyce even used the term in his Ulysses.he word horny sexually excited, lecherous derives from an interesting yet not surprising source. As early as the mid-18th century, an erection was known as a horn or the horn, simply because it looked a bit like one.
Charles' Law. Statement. For a fixed mass of gas at constant pressure, the volume is directly proportional to the kelvin temperature. That means, for example, that if you double the kelvin temperature from, say to 300 K to 600 K, at constant pressure, the volume of a fixed mass of the gas will double as well.
As an example, we will calculate the volume occupied by a gas behaving ideally at standard temperature and pressure (STP). The conditions of STP are 0.00 o C and 1.00 atm pressure. Recall that the temperature of a gas is expressed in Kelvin: 0 + 273.15 = 273.15 K The volume occupied by 1.00 mole of a gas behaving ideally at STP is: Another set of conditions which are commonly employed in physical chemistry is standard ambient temperature and pressure (SATP). The temperature of SATP is 25.00 oC and the pressure is 1.00 bar (1.00 bar = 0.987 atm).