Question

In: Chemistry

Experiment 1: Study the Relationship Between Volume and Temperature for a Sample of Air Took a...

Experiment 1: Study the Relationship Between Volume and Temperature for a Sample of Air

Took a Erlenmeyer flask & placed it on the workbench; closed flask.

Added 1.50 atm of air to the flask.

Attached a gas syringe & thermometer to the Erlenmeyer flask; remember the Erlenmeyer flask volume is 150 mL.

The volume of air in the syringe = 75.0 mL

The total air volume = 225.0 mL

The temperature = 21.5 C

Ran the constant temperature bath to 0 °C; moved the Erlenmeyer flask into the constant temperature bath. Waited until the temperature stabilized at 0.0 °C.

The volume of air in the syringe = 58.6 mL

The total air volume = 208.6 mL

The temperature = 0.0 °C.

Ran the bath to 40 °C.

Waited until the temperature of the air stabilized at 40.0 °C.

The volume of air in the syringe = 89.1 mL

The total air volume = 239.1 mL

The temperature = 40 °C.

Ran the bath to 60 °C

The volume of air in the syringe = 104.4 mL

The total air volume = 254.4 mL

The temperature = 60 °C

Ran the bath to 80 °C

The volume of air in the syringe = 119.7 mL

The total air volume = 269.7 mL

The temperature = 80 °C

Ran the bath to 100 °C

The volume of air in the syringe = 135.0 mL

The total air volume = 285.0

What parameters were held constant in experiment 1?

A. pressure and number of moles

B. volume and pressure

C. temperature and volume

D. volume and number of moles

Given the data you collected in experiment 1, what is the relationship between volume & temperature?

A. The volume increases as the temperature increases.

B. The volume increases as the temperature decreases.

C. The volume changes randomly with temperature.

D. The volume remains constant as the temperature increases.

Solutions

Expert Solution

Ans (1) In the given experiment pressure and number of moles are constant. The constant pressure is 1.50 atm. Since the flask is closed so after heating and cooling there will not be any change in number of moles.

Ans (2) From the given data, we have

Case (1) Volume of air in the syringe = 58.6 mL

Total air volume = 208.6 mL

Temperature = 0.0 ^oC

Case (2) Volume of air in the syringe = 89.1 mL

Total air volume = 239.1 mL

Temperature = 40.0 ^oC

Case (3) Volume of air in the syringe = 104.4 mL

Total air volume = 254.4 mL

Temperature = 60.0 ^oC

From this data it is very clear that on increasing the temperature volume also increase which suggest that volume is directly proportional to temperature.

So the correct option will be (A) The volume increases as the temperature increases.

queen_honey_blossom answered 1 year ago

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