# Henry's law p = kx vs m = kp

What exactly is the difference between the following equations? $$p = kx \qquad\text{and}\qquad m = kp$$ Is the $$k$$ in both same, because I have seen same $$k$$ in textbooks for both equations?

• Both are different Henry's law constants. See: en.wikipedia.org/wiki/Henry%27s_law – William R. Ebenezer May 20 at 20:48
• Henry's law constants also reflect an implicit scale: molality, mole fraction, concentration, etc. (with a given reference state defined as such). – Rolf May 20 at 22:40