Q1: Variation of vapor pressure with temperature can be calculated using Clausius-Clapeyron equation, which assumes that the

ANS:D - all (a), (b) & (c).

The Clausius-Clapeyron equation describes the variation of vapor pressure with temperature for a substance undergoing phase change, typically from liquid to vapor. Regarding the assumptions underlying the Clausius-Clapeyron equation: a. The vapor does not necessarily follow the ideal gas law. The equation is derived from thermodynamics principles and does not explicitly rely on the ideal gas law. b. The Clausius-Clapeyron equation does assume that the molal latent heat of vaporization is constant within the limited temperature range over which it applies. This assumption simplifies the equation and is generally valid for small temperature ranges. c. The equation also assumes that the volume in the liquid state is negligible compared to that in the vapor state. This assumption allows for the simplification of the equation by neglecting the volume of the liquid phase compared to the volume of the vapor phase. So, the correct option is: both (b) and (c)