The accentric factor of a materical, 'ω', is defined as ω = -log₁₀ (P_r^sat)T_r^-1 = 0.7, where, P_r^sat = reduced vapor pressure, T_r = reduced temperature. The value of accentric factor is always

Sublimation temperature of dry ice (solid CO₂) is __________ °C.

The equation relating E, P, V and T which is true for all substanes under all conditions is given by $${\left( {\frac{{\partial {\text{E}}}}{{\partial {\text{V}}}}} \right)_{\text{T}}} = {\text{T}} \cdot {\left( {\frac{{\partial {\text{P}}}}{{\partial {\text{T}}}}} \right)_{\text{H}}} - {\text{P}}{\text{.}}$$      This equation is called the

Henry's law is closely obeyed by a gas, when its __________ is extremely high.

If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero.