Converting gas particles to moles using Avogadro's number

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In summary, the gas pressure in the photosphere varies significantly at different levels. The pressure is lowest at the top with a temperature of 4500 K and 1.6x10^16 gas particles per cubic centimeter and highest at the bottom with a temperature of 7000 K and 1.5x10^17 gas particles per cubic centimeter. This can be explained by using the ideal gas law and considering the number of gas particles per cubic centimeter. By converting the number of particles into moles using Avogadro's number, we can see that the pressure increases as the number of particles increases, leading to higher pressures at the bottom of the photosphere.
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lmannoia
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Astronomy -- pressures

Homework Statement


The gas pressure of the photosphere changes substantially from its upper levels to its lower levels. Near the top of the photosphere and the temperature is about 4500 K and there are about 1.6x10^16 gas particles per cubic centimeter. In the middle the temperature is about 5800 K and there are about 1.0 x 10^17 gas particles per cubic centimeter. At the bottom of the photosphere the temperature is about 7000 K and there about about 1.5 x 10^17 gas particles per cubic centimeter. Using the ideal gas law (P = n(kb)T), compare the pressures of each of these layers and explain the reason for this trend.


Homework Equations





The Attempt at a Solution


Okay, how would you convert the number of gas particles per cubic centimeter into moles (for 'n' in the ideal gas law)? That's what I'm stuck on. Any help is appreciated!
 
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Ever heard about Avogadro's number?

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FAQ: Converting gas particles to moles using Avogadro's number

What is the atmospheric pressure on different planets?

Atmospheric pressure refers to the force exerted by the weight of the atmosphere on a given surface. On Earth, the average atmospheric pressure at sea level is 1013.25 hPa (hectopascals). However, this pressure varies greatly on other planets, such as Mars with an average pressure of 6.36 hPa and Venus with an average pressure of 92,100 hPa.

How does atmospheric pressure affect human life on Earth?

Atmospheric pressure plays a crucial role in our survival on Earth. It allows for the existence of liquid water, necessary for our bodily functions. It also helps to regulate our body's internal pressure, preventing our blood from boiling due to the low pressure at high altitudes. Changes in atmospheric pressure can also affect our breathing, causing discomfort or even altitude sickness.

What are the different types of pressure in astronomy?

There are three main types of pressure in astronomy: atmospheric pressure, hydrostatic pressure, and radiation pressure. Atmospheric pressure is the force exerted by the atmosphere, while hydrostatic pressure is the pressure exerted by a fluid at rest. Radiation pressure is the force exerted by electromagnetic radiation, such as light, on a surface.

How do astronomers measure pressure in outer space?

Astronomers use a variety of instruments to measure pressure in outer space. One common method is through spectroscopy, which measures the absorption or emission of light by different elements in a celestial object's atmosphere. Another method is through the use of telescopes, which can measure the changes in brightness and density of an object to determine its pressure.

Can atmospheric pressure affect astronomical observations?

Yes, atmospheric pressure can affect astronomical observations. High atmospheric pressure can cause atmospheric distortion, known as seeing, which can blur or distort images. This is why many observatories are built at high altitudes with lower atmospheric pressure to minimize this effect. Additionally, changes in atmospheric pressure can affect the transparency of the atmosphere, making it difficult to observe certain wavelengths of light.

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