The organic compounds chloroform and dichloromethane form ideal solutions when mixed together; at 25 °C the total vapor pressure from a mixture of these two compounds was 282.133 torr. What is the mole fraction of chloroform? Given that the vapor pressure of pure chloroform and pure dichloromethane are 205 torr and 415 torr, respectively, at 25 °C.
What is the vapor pressure at 23 °C of a solution composed of 22.98 g of naphthalene (a non-volatile compound, MW = 128 g/mol) and 39.54 g of benzene (MW = 78.06 g/mol). Given the vapor pressure of pure benzene at 23 °C is 86 torr.