A Solution of Methanol and Water Has a Vapour Pressure

question 97

Multiple Choice

A solution of methanol and water has a vapour pressure of 213 Torr. What would you predict as the mole fractions of each component, assuming ideal behaviour? The vapour pressures of methanol and water are 256 Torr and 55.3 Torr, respectively.

• A) = 0.214, = 0.786
• B) = 0.786, = 0.214
• C) = 0.885, = 0.115
• D) = 0.900, = 0.100
• E) = 0.115, = 0.885

---

Definitions:

Touch

The sense that allows organisms to perceive and interpret information from the external environment through physical contact.

Sensory Adaptation

The process by which sensory receptors become less sensitive to constant or unchanging stimuli over time, allowing individuals to focus on changes in their environment.

Absolute Threshold

The lowest level of stimulation that an organism can detect at least 50% of the time.

Attention

The process of sorting through sensations and selecting some of them for further processing.