Ideal Gas & Boiling Point – Organic Chemistry Quiz

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Organic Chemistry Calculations, Ideal Gas & Boiling Point – Chemistry

The key terms of this chapter include Boiling Point, Temperature, Ideal Gas.


For many purposes we can treat butane (C4H10 ) as an ideal gas at temperatures above its boiling point of −1.°C.

Suppose the pressure on a 800.mL sample of butane gas at 44.0 °C is tripled.

Answer

Ideal Gas & Boiling Point - Organic Chemistry Quiz

A sample of an unknown compound is vaporized at 200.°C . The gas produced has a volume of 960.mL at a pressure of 1.00atm, and it weighs 0.841g.

Assuming the gas behaves as an ideal gas under these conditions, calculate the molar mass of the compound. Round your answer to 3 significant digits.

Answer

The molar mass of the unknown compound is 34.0 g/mol.


Combustion of hydrocarbons such as heptane (C7H16) produces carbon dioxide, a “greenhouse gas.” Greenhouse gases in the Earth’s atmosphere can trap the Sun’s heat, raising the average temperature of the Earth. For this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.

Answer


Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right). This makes it easy to isolate and measure the amount of gas produced.
Suppose the CO gas evolved by a certain chemical reaction taking place at 50.0 °C is collected over water, using an apparatus something like that in the sketch, and the final volume of gas in the collection tube is measured to be 92.0 mL..
Sketch of a gas-collection apparatus

Calculate the mass of CO that is in the collection tube. Round your answer to 2 significant digits. You can make any normal and reasonable assumption about the reaction conditions and the nature of the gases. that is in the collection tube. Round your answer to 2 significant digits. You can make any normal and reasonable assumption about the reaction conditions and the nature of the gases.

Answer

0.085 g


Ideal Gas & Boiling Point – Organic Chemistry Quiz


Here is a graph of the probability of an atom moving with a particular speed, for a sample of xenon gas at −143.°C.

Use this graph to answer the following questions. Round each of your answers to the nearest m/s..

Note: your answers must be within 25 m/s of the exact answers to be graded correct.

Answer

Ideal Gas & Boiling Point - Organic Chemistry Quiz

A gas made up of atoms escapes through a pinhole 1.81 times as fast as Xe gas. Write the chemical formula of the gas.

Answer

Ar


For many purposes we can treat butane (C4H10 ) as an ideal gas at temperatures above its boiling point of −1.°C

Suppose the pressure on a 800.mL sample of butane gas at 44.0 °C is tripled.

Answer

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A sample of an unknown compound is vaporized at 200.°C . The gas produced has a volume of 960.mL at a pressure of 1.00atm, and it weighs 0.841g.

Assuming the gas behaves as an ideal gas under these conditions, calculate the molar mass of the compound. Round your answer to 3 significant digits.

Answer

The molar mass of the unknown compound is 34.0 g/mol.


Ideal Gas & Boiling Point – Organic Chemistry Quiz


Combustion of hydrocarbons such as heptane (C7H16) produces carbon dioxide, a “greenhouse gas.” Greenhouse gases in the Earth’s atmosphere can trap the Sun’s heat, raising the average temperature of the Earth. For this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.

Answer

Ideal Gas & Boiling Point - Organic Chemistry Quiz



Calculate the mass of CO that is in the collection tube. Round your answer to 2 significant digits. You can make any normal and reasonable assumption about the reaction conditions and the nature of the gases.

Answer

0.085 g


Here is a graph of the probability of an atom moving with a particular speed, for a sample of xenon gas at −143.°C.

Ideal Gas & Boiling Point - Organic Chemistry Quiz

Use this graph to answer the following questions. Round each of your answers to the nearest m/s..

Note: your answers must be within 25 m/s of the exact answers to be graded correct.

Answer

Ideal Gas & Boiling Point - Organic Chemistry Quiz

A gas made up of atoms escapes through a pinhole 1.81 times as fast as Xe gas. Write the chemical formula of the gas.

Answer

Ar


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 significant digits. You can make any normal and reasonable assumption about the reaction conditions and the nature of the gases.

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