Hvap of Ice The heat of vaporization Hvap of ice is 40.65 kJ/mol, and the molar mass M, of ice is 18.02 g/mol.
How much thermal energy must be absorbed to completely evaporate 100 g water at 100.0°C, without a change in temperature?

to figure the total magnification of an image that you are viewing through the microscope is really quite simple. to get the total magnification take the power of the objective (4x, 10x, 40x) and multiply by the power of the eyepiece, (usually 10x)