Ethyl alcohol has a vapor pressure of 20.0 mm hg at 8.0°c and a normal boiling point of 78.4°c. estimate the vapor pressure at 45°c using (a) the antoine equation; (b) the clausius–clapeyron equation and the two given data points; and (c) linear interpolation between the two given points. taking the first estimate to be correct, calculate the percentage error associated with the second and third estimates.