Question

Chemistry 121, Spring 2018 Worksheet (Ch 13) /10 points Name: Which phase change corresponds to fusion? a] liquid to gas b] solid to liquid 1. [e] solid to gas Id] gas to liquid 2. In a system at equilibrium between the liquid and gas phases the rate at which particles change from gas to liquicd a] exceeds the rate at which they change from liquid to gas lb] exceeds the rate at which they change from gas to liquid [c] equals the rate at which they change from liquid to gas 3. The following table lists normal boiling points for different substances. Which of the following is true? ?BoilingPointec) 140.8 Substance propionic acid acetic acid acetone 2-methylbutane 56.24 27.9 [a] vapor pressure of propionic acid is the highest b] molecules of acetone experience the weakest interactions [c] molecules of propionic acid experience the strongest interactions d] vapor pressure of 2-methylbutane is the lowest 4. The vapor pressure of a liquid is the pressure, at equilibrium, of the [a] solid above its liquid[b] liquid above its solid [e] gas above its liquid [d] liquid above its gas 5. As the volatility of a liquid increases, its equilibrium vapor pressure el incresses [y] decreses tel 6. The boiling point temperature of a liquid is the temperature at which its vapor pressure is greater than the external pressure. [a] true b] false 7. The normal boiling point of a liquid is the temperature at which its vapor pressure equals [al 100 torr [b] 337 torr [c] 373 torr [d] 760 torr

Answer 1

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