Question

Consider a situation in which a flask is half-filled with liquid water at room temperature. The...

Consider a situation in which a flask is half-filled with liquid water at room temperature. The partially filled flask is then sealed and given time to reach equilibrium. Which of the following statements are true? [Select all that apply.]

After the flask reaches equilibrium, there will no longer be any movement of individual water molecules from the gas phase into the liquid phase.

The rate of condensation decreases as the flask approaches equilibrium.

The rate of condensation increases as the flask approaches equilibrium.

The vapor pressure of the water is the partial pressure of water (Pwater) in the flask after it reaches equilibrium.

If given enough time, the water will evaporate completely.

After the flask reaches equilibrium, there will no longer be any movement of individual water molecules from the liquid phase into the gas phase.

Once the flask reaches equilibrium the rate at which water molecules move from the liquid to the gas phase is equal to the rate at which water molecules move from the gas to the liquid phase.

The vapor pressure of the water is the total pressure in the flask after it reaches equilibrium.

0 0
Add a comment Improve this question Transcribed image text
Answer #1

If a flask is half-filled with liquid water at room temperature and is then sealed and given time to reach equilibrium. By equilibrium we mean the liquid water to turn into vapor due to the random movements of water molecules and getting out of the liquid surface and the vapor to condense into water due to the random movements of the vapor molecules and coming into the surface of the liquid. Initially the rate of vaporization is usually very high and as it reaches equilibrium the rate of vaporization decreases and the flask will become to get saturated with the vapor so as the equilibrium approaches the rate of condensation will increase and when it will reach the equilibrium then the rate of condensation of vapor will be equal to the rate of vaporization of water. The pressure exerted by the vapor in equilibrium is known as the vapor pressure of water so the partial pressure of water will be the vapor pressure of water and the total pressure of the flask will be the sum of the vapor pressure and the pressure exerted by the gas molecules that were present before.

So for the given options:

1) After the flask reaches equilibrium, there will no longer be any movement of individual water molecules from the gas phase into the liquid phase. This statement is false.

2) The rate of condensation decreases as the flask approaches equilibrium. This statement is false.

3) The rate of condensation increases as the flask approaches equilibrium. This statement is true.

4) The vapor pressure of the water is the partial pressure of water (Pwater) in the flask after it reaches equilibrium. This statement is true.

5) If given enough time, the water will evaporate completely. This statement is false.

6) After the flask reaches equilibrium, there will no longer be any movement of individual water molecules from the liquid phase into the gas phase. This statement is false.

7) Once the flask reaches equilibrium the rate at which water molecules move from the liquid to the gas phase is equal to the rate at which water molecules move from the gas to the liquid phase. This statement is true.

8) The vapor pressure of the water is the total pressure in the flask after it reaches equilibrium. This statement is false.

Add a comment
Know the answer?
Add Answer to:
Consider a situation in which a flask is half-filled with liquid water at room temperature. The...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • In a sealed 250 mL flask, 0.0403 g of liquid water is in equilibrium with its...

    In a sealed 250 mL flask, 0.0403 g of liquid water is in equilibrium with its vapor at 70°C. Calculate the percentage of the total mass of water that is in the vapor phase. Water data:       ρ = 1.00 g mL–1; p*(70°C) = 0.308 atm

  • Answer and reason please! 7. When a liquid is in dynamic equilibrium with its vapor in...

    Answer and reason please! 7. When a liquid is in dynamic equilibrium with its vapor in a closed container: (a) the rate at which molecules from the liquid phase enter the gas phase exactly equals the rate at which molecules from the gas phase pass into the liquid phase. (b) a change in temperature will not change the pressure in the container (c) the amount of gas in the container must exactly equal the amount of liquid. (d) molecules cannot...

  • 34) Which of the followine represent STP Standard Temperature and Pressure) conditions A) TOK and Plam BT-0"C and P...

    34) Which of the followine represent STP Standard Temperature and Pressure) conditions A) TOK and Plam BT-0"C and P760 atm CT-273 K and P-0 atm D) T-273 K and P lam ETIK and Patm 25) 23) Which of the following is TRUE for a liquid that is placed in a sealed container? A) Condensation of the evaporated molecules in the car can only occur once all of the liquid molecules are in the vapor for gaseous) state. B) A set...

  • 24) Which of the following represent STP (Standard Temperature and Pressure) conditions? A) T -0 K...

    24) Which of the following represent STP (Standard Temperature and Pressure) conditions? A) T -0 K and P = 1 atm B) T=0°C and P 760 atm C) T= 273 K and P = 0 atm D) T-273 K and P-1 atm E) T = 1 K and P = 1 atm 25) Which of the following is TRUE for a liquid that is placed in a sealed container? A) Condensation of the evaporated molecules in the jar can only...

  • figure 1 Figure 2 Liquid ethanol mm P increasing P = equilibrium vapor pressure P=0 Add...

    figure 1 Figure 2 Liquid ethanol mm P increasing P = equilibrium vapor pressure P=0 Add System comes to equilibrium ethanol Evacuated flask, pressure zero Molecules begin to vaporize, pressure increases Molecules leave and enter liquid at equal rates, pressure reaches steady-state value 34.6 °C 78.3°C 100 °C Normal boiling point Diethyl ether Vapor pressure (torr) Ethyl alcohol (ethanol) Water Ethylene glycol 100 20 40 60 80 Temperature (°C) Copyright 2009 Pearson Prentice Hall,Inc. Click on: (Figure 2) and study...

  • Problem 6.10 Water Vapor Changes A gas mixture contains 10.0 mole% H2O(v) and 90.0 mole Ny....

    Problem 6.10 Water Vapor Changes A gas mixture contains 10.0 mole% H2O(v) and 90.0 mole Ny. The gas temperature and absolute pressure at the start of each of the three parts of this problem are SAC and 700.0 mm Hg. Ideal gas behavior may be assumed in every part of this problem. a. If some of the gas mixture is put in a cylinder and slowly cooled at constant pressure, at what temperature would the first drop of liquid form?...

  • 1. (relative humidity) The partial pressure of water vapor in air is usually less than the...

    1. (relative humidity) The partial pressure of water vapor in air is usually less than the equilibrium vapor pressure (or saturation pressure) at the ambient temperature; this is why a cup of water will spontaneously evaporate. The ratio of the partial pressure of water vapor to the equilibrium vapor pressure (at the same temperature) is called the relative humidity. Saturated air, at 100% relative humidity, would be in equilibrium with a cup of liquid water. The saturation pressure depends strongly...

  • Room 90 m 12°C 1) A container filled with 45 kg of liquid water at 95°C...

    Room 90 m 12°C 1) A container filled with 45 kg of liquid water at 95°C is placed in a 90-m room that is initially at 12°C. Thermal equilibrium is established after a while as a result of heat transfer between the water and the air in the room. Using constant specific heats, determine (a) the final equilibrium temperature, (b) the amount of heat transfer between the water and the air in the room, and (c) the entropy generation. Assume...

  • Chemistry 121, Spring 2018 Worksheet (Ch 13) /10 points Name: Which phase change corresponds to fusion?...

    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]...

  • Chame nsead tu age 06-17 Experiment 8: Molar Mass of a Volatile Liquid Purpose To determine...

    Chame nsead tu age 06-17 Experiment 8: Molar Mass of a Volatile Liquid Purpose To determine the molar mass of a pure substance we need to find out (a) the number of moles in a given sample, and (b) the mass of the same sample. Molar mass is then: mass divided by moles Introduction Using the ideal gas equation, PV= nRT, we can determine the number of moles (n) of gas or vapor under measured conditions of pressure (P), volume...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT