Calculating Hydrogen Mass from Ideal Gas Law

In summary, the conversation discusses the calculation of the mass of hydrogen gas in a 25-L container at a given pressure and temperature. The relevant equations are mentioned, including the ideal gas law and the volumetric mass of hydrogen. The correct answer is determined to be 2.8 g after calculating the number of moles of hydrogen in the container.
  • #1
ChloeYip
93
1

Homework Statement



(introduction course of university physics)

A 25- L container holds ideal hydrogen (H2) gas at a gauge pressure of 0.25 atm and a

temperature of 0°C. What mass of hydrogen gas is in this container? The ATOMIC mass of

hydrogen is 1.0 g/mol, the ideal gas constant is R = 8.314 J/mol•K = 0.0821 L ∙ atm/mol ∙ K, and

1.00 atm = 101 kPa.

A) 1.4 g B) 6.3 g C) 4.2 g D) 2.8 g E) 5.6 g

Answer:D

Homework Equations


pV=nRT
volumetric mass of H2

The Attempt at a Solution



I have no more idea other than the mentioned relevant equation

Thank you
 
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  • #2
Can you determine how many moles of hydrogen is in the container?
 
  • #3
ChloeYip said:
I have no more idea other than the mentioned relevant equation
What result do you get with that equation?
 
  • #4
Chestermiller said:
Can you determine how many moles of hydrogen is in the container?
oh yes... I figured it out!
Thanks
 
Last edited:

1. What is the gas law hydrogen problem?

The gas law hydrogen problem refers to a common issue encountered in scientific experiments involving hydrogen gas. It arises when the gas does not behave according to the ideal gas law, which states that the pressure and volume of a gas are inversely proportional at a constant temperature. In the case of hydrogen gas, it often deviates from this law due to its small size and high reactivity.

2. What causes the gas law hydrogen problem?

The gas law hydrogen problem is caused by the unique properties of hydrogen gas. Its small size allows it to easily escape through small openings in containers, leading to inaccurate pressure measurements. Additionally, hydrogen is highly reactive and can easily combine with other elements or compounds, altering its behavior and deviating from the ideal gas law.

3. How can the gas law hydrogen problem be solved?

To solve the gas law hydrogen problem, scientists often use techniques such as cooling and compressing the gas to reduce its reactivity and increase its density. They may also use specialized equipment, such as gas burettes, to accurately measure the volume of hydrogen gas. Additionally, researchers must carefully control the experimental conditions to minimize any external factors that may affect the behavior of the gas.

4. What are the implications of the gas law hydrogen problem?

The gas law hydrogen problem can have significant implications for scientific experiments and industrial processes that involve hydrogen gas. It can lead to inaccurate results and affect the reliability and validity of research findings. In industries such as fuel cells and hydrogen production, the gas law hydrogen problem can also impact the efficiency and safety of operations.

5. Are there any exceptions to the gas law hydrogen problem?

Yes, there are exceptions to the gas law hydrogen problem. For example, at extremely low temperatures, hydrogen gas can behave more like an ideal gas due to reduced reactivity. Additionally, at very high pressures, hydrogen gas can exhibit behavior closer to that of an ideal gas. However, these exceptions require extreme conditions and may not be applicable in most scientific experiments or industrial processes.

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