This video shows how to use Microsoft Excel to do iterations using the "goal seek" and "solver" tools ******************************************************* There is a mistake in the function written to calculate v in cell H11 --------------------------------------------------------------------------------------------------------- The equation should be: (P+a/v^2)(v-b)=RT which after expansion will be: Pv^3-(Pb+RT)v^2+av-ab=0 So the right formula in H11 will be: =H4*H9^3-(H4*I2+H5*H6)*H9^2+H2*H9-H2*I2 The right solution is mol/lit. Sorry for that mistake!