Formula and The Henry's Law Constant
Henry's law can be put into mathematical terms (at constant temperature) as
where p is the partial pressure of the solute in the gas above the solution, c is the concentration of the solute and kH is a constant with the dimensions of pressure divided by concentration. The constant, known as the Henry's law constant, depends on the solute, the solvent and the temperature.
Some values for kH for gases dissolved in water at 298 K include:
- oxygen (O2) : 769.2 L·atm/mol
- carbon dioxide (CO2) : 29.41 L·atm/mol
- hydrogen (H2) : 1282.1 L·atm/mol
There are other forms of Henry's Law, each of which defines the constant kH differently and requires different dimensional units. In particular, the "concentration" of the solute in solution may also be expressed as a mole fraction or as a molality.
Read more about this topic: Henry's Law
Famous quotes containing the words formula, henry, law and/or constant:
“The formula for achieving a successful relationship is simple: you should treat all disasters as if they were trivialities but never treat a triviality as if it were a disaster.”
—Quentin Crisp (b. 1908)
“Saturday night was for wives, but Friday night at the Copa was always for the girlfriends.”
—Nicholas Pileggi, U.S. screenwriter, and Martin Scorsese. Henry Hill (Ray Liotta)
“To be a Negro is to participate in a culture of poverty and fear that goes far deeper than any law for or against discrimination.... After the racist statutes are all struck down, after legal equality has been achieved in the schools and in the courts, there remains the profound institutionalized and abiding wrong that white America has worked on the Negro for so long.”
—Michael Harrington (1928–1989)
“For me, it is as though at every moment the actual world had completely lost its actuality. As though there was nothing there; as though there were no foundations for anything or as though it escaped us. Only one thing, however, is vividly present: the constant tearing of the veil of appearances; the constant destruction of everything in construction. Nothing holds together, everything falls apart.”
—Eugène Ionesco (b. 1912)