Stoichiometry
What is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-xylene at 100°C, if their vapor pressures at 100°C are 1340, 560 and 210 mmHg respectively?

801.5
756.2
880.5
780.5

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

All of these
Vapor follows the ideal gas law
Volume in the liquid state is negligible compared with that in the vapor state
Molal latent heat of vaporisation is constant within the limited temperature range

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