answer

watching

views

11 Dec 2019

Charlesâ Law Experiment

you determined the relationship between volume and temperature for air (which is a mixture of different gases). Suppose a fixed quantity of air is maintained at constant pressure as the volume decreases from 7.75 L to 2.25 L. At 7.75 L, the temperature is 60 Â°C.

1. What is the equation that describes Charlesâs Law?
2. What is 60 Â°C in Kelvins?
3. When the volume is decreased from 7.75 L to 2.25 L at constant pressure, the temperature will decrease. What is the temperature (in Kelvins) at 2.25 L?
4. Charlesâs Law is supposed to describe an ideal gas. How is it that we can use air (a mixture of gases) in this experiment?

answer

watching

145

views

For unlimited access to Homework Help, a Homework+ subscription is required.

You have 0 free answers left.
Get unlimited access to 3.8 million step-by-step answers.

Get unlimited access

Already have an account? Log in

Lelia LubowitzLv2

13 Dec 2019

Unlock all answers

Get 1 free homework help answer.

Already have an account? Log in

Join us on Discord

Chemistry Study Group

Join now

Related questions

Charlesâs law states that the volume of a gas is directly related to the absolute temperature when there is no change in the pressure or amount of gas: (Figure 1)

V1T1=V2T2

Part A

A sample of gas in a balloon has an initial temperature of 30 âC and a volume of 1770 L . If the temperature changes to 90 âC , and there is no change of pressure or amount of gas, what is the new volume, V2, of the gas?

Express your answer with the appropriate units.

Part B

What Celsius temperature, T2, is required to change the volume of the gas sample in Part A (T1 = 30 âC , V1= 1770 L ) to a volume of 3540 L ? Assume no change in pressure or the amount of gas in the balloon.

Express your answer with the appropriate units.

Show transcribed image text

Question 11 pts

Which general statement about gases is NOT correct?

The molecules of a pure gas are distributed evenly throughout the container.

Gases are much less dense than liquids or solids

Molecules in a gas mixture can form layers according to their densities

Gases can be compressed, even to the point of liquefaction

Flag this Question

Question 21 pts

Which example is the greatest pressure?

1.00 atm

101 kPa

760 mm Hg (= 760 torr)

All of the above pressures are equal.

Flag this Question

Question 31 pts

Which example is the greatest pressure?

850 mm Hg (= 850 torr)

1.5 atm

All of the above pressures are equal.

96 kPa

Flag this Question

Question 41 pts

Assuming all other variables are held constant, a graph of which of the following will NOT yield a straight line?

Flag this Question

Question 51 pts

A sealed vessel contains 0.250 mol of oxygen gas. Which of the following will result in a decrease in the pressure of the oxygen gas?

increasing the number of moles of oxygen

increasing the temperature of the vessel

increasing the volume of the vessel

adding some helium to the vessel

Flag this Question

Question 61 pts

According to Charlesâs law, which change will cause the pressure of a gas to double? Pressure and amount of gas are constant.

The temperature decreases from 650 K to 325 K.

The temperature of the sample decreases fromï¿½88 Â°C to 44 Â°C.

The temperature of the sample increases fromï¿½22 Â°C to 44 Â°C.

The temperature of the sample increases fromï¿½250 K to 500 K.

Flag this Question

Question 71 pts

Which set of units for P, V, and T can be used for combined gas law calculations?

torr, L, and Kelvins

tm, g/L, and Kelvins

atm, mL, and degrees Celsius

inches of mercury, g/mL, and degrees Celsius

Flag this Question

Question 81 pts

The vapor pressure of a gas is

the atmospheric pressure at which the boiling point is determined.

the pressure at a Kelvin temperature exactly two times the boiling point.

impossible to determine experimentally without knowing the temperature and volume.

the pressure above a gas sample when evaporation and condensation are balanced.

Flag this Question

Question 91 pts

In a chemistry experiment where CO2 is collected over water, the atmospheric pressure is 755 mm. The partial pressure of water at the temperature in the lab is 24.2 mm. What is the pressure of the CO2?

779 mm

731 mm

More information is needed to answer this question

755 mm

Flag this Question

Question 101 pts

Which statement is NOT true according to the kinetic molecular theory of gases?

Molecules undergo elastic collisions

Molecules move in straight-line paths.

Molecules of different gases have differentï¿½kinetic energies at the same temperature

Molecules occupy a negligible volume.

Flag this Question

Question 111 pts

Which statement is NOT true according to the ideal
gas law?

At constant P & T, V must increase when n increases.

At constant V & T, P must decrease when n decreases.

At constant V & n, P must increase when T increases.

At constant P & n, V must decrease when T increases

Breathing is an application of Boyleâs law (Figure 10.8). As the diaphragm muscle beneath our lungs contracts, the pressure inside our lungs decreases causing air to rush into our mouth and nasal passages to fill the lungs. When the diaphragm muscle relaxes, it increases the air pressure causing air to be expelled from the lungs. A typical lung volume is 3.50 L. Air pressure inside the lungs changes by approximately 0.040 atm. A sample of air has a volume of 3.50 L at 1.00 atm. What is the volume of this air sample if the pressure is changed to 0.960 atm at constant temperature? This question gives an initial gas pressure and volume then asks for the new gas volume at a different pressure at constant temperature and gas amount. These are indicators to use Boyleâs law.

What is the volume (in liters) of this air sample if the pressure is changed to 0.960 atm at constant temperature?

Weekly leaderboard

Home

Homework Help 3,900,000

Chemistry 830,000

Unlock all answers

Related textbook solutions

Basic Chemistry

Principles of Chemistry Molecular Approach

Chemistry: Structure and Properties

Principles of Chemistry Molecular Approach

Chemistry: A Molecular Approach

Chemistry: A Molecular Approach

Principles of Chemistry: A Molecular Approach

Chemistry: The Central Science

Related questions

Weekly leaderboard