Gay-lussac's law - Science Fourth Grade

P1 / T1 = P2 / T2

Where:

P1 = initial pressure of the gas
T1 = initial temperature of the gas (in Kelvin)
P2 = final pressure of the gas
T2 = final temperature of the gas (in Kelvin)

To apply Gay-Lussac's Law, it's important to remember to always convert temperatures to Kelvin before using them in the formula. This can be done by adding 273.15 to the temperature in degrees Celsius.It's also essential to keep the volume of the gas constant when using Gay-Lussac's Law. This means that the gas is held in a rigid container or the container's size is adjusted to maintain a constant volume.A real-world example of Gay-Lussac's Law is the behavior of a sealed container of gas when heated. As the temperature increases, the pressure inside the container also increases, demonstrating the direct relationship between pressure and temperature at constant volume.In summary, Gay-Lussac's Law provides a quantitative relationship between the pressure and temperature of a gas at constant volume, and it can be expressed using the formula P1 / T1 = P2 / T2.Now, let's review some practice questions to reinforce the understanding of Gay-Lussac's Law:1. If a gas has an initial pressure of 2.0 atm at a temperature of 300 K, what will be its pressure at 350 K, assuming the volume remains constant? Using Gay-Lussac's Law: P1 / T1 = P2 / T2

2.0 atm / 300 K = P2 / 350 K

Solving for P2:

P2 = (2.0 atm * 350 K) / 300 K

P2 = 2.33 atm

Therefore, the pressure of the gas at 350 K will be 2.33 atm.2. A gas at a pressure of 3.0 atm and a temperature of 400 K is cooled until its pressure is 2.0 atm. What is the final temperature of the gas, assuming the volume remains constant? Using Gay-Lussac's Law: P1 / T1 = P2 / T2

3.0 atm / 400 K = 2.0 atm / T2

Solving for T2:

T2 = (2.0 atm * 400 K) / 3.0 atm

T2 = 266.67 K

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The resources above cover the following skills:

The Living Environment: Students understand that cells are the basic unit of life, that all life as we know it has evolved through genetic transfer and natural selection to create a great diversity of organisms, and that these organisms create interdependent webs through which matter and energy flow. Students understand similarities and differences between humans and other organisms and the interconnections of these interdependent webs.

Cells: Students describe how living things are made up of one or more cells and the ways cells help organisms meet their basic needs.

Give examples of organisms that consist of a single cell and organisms that are made of a collection of cells.

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◂Science Worksheets and Study Guides Fourth Grade. Cells- The building blocks of living things

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