E-10

Pre-lab exercises

1. As the attractive force between the liquid molecules getting weaker, the surface tension decreases with rising temperature.
2. V_Capillary= 100mL(1000cm³/L)(1L/10⁶mL) = 0.1cm³.

Calculatiion
In eq.(10-2) g = (Vrg)/(2pR), where V = 2.0mL/n(mean)
In eq. (10-3) R = Ö(V_capillary/2pL), Where V_capillary = 100mL.
Two V's are different.

Answer to question 2

% error = r_air/r
= 100(0.0012g/cm³/1g/cm³/)
= 0.12% for wter