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# Atmospheric Chemistry Quiz

Created by
@CoolestElbaite

### Calculate the mass of Pluto's atmosphere, given the atmospheric pressure is 105 Pa, the area is 5 x 10^14 m^2, and the acceleration due to gravity is 9.8 m/s^2.

The mass of Pluto's atmosphere is calculated using the equation $Mass = Pressure \times Area / Acceleration = P \times 4\pi R^2 / g = (105 Pa) \times (5 \times 10^{14} m^2) / (9.8 m/s^{-2}) = 5.2 \times 10^{18} Kg$.

### Explain the two processes through which free radicals are produced in the atmosphere.

<p>Free radicals in the atmosphere are produced through two processes: 1. Dark Chemical Reactions (without photons), such as OH + CH4 → CH3 + H2O, and 2. Photochemical Reactions (with photons), such as O2 + hν → 2 O H; O; OH; OOH; NO; NO2; NO3; CH3O; CH3OO; HCO etc.</p> Signup and view all the answers

### What is the concentration of the mentioned radicals in the atmosphere?

<p>The concentration of the mentioned radicals in the atmosphere is only 10 ppb (parts per billion).</p> Signup and view all the answers

## Study Notes

### Calculating the Mass of Pluto's Atmosphere

• Atmospheric pressure on Pluto is 105 Pa.
• Area encompassing the atmosphere is 5 x 10^14 m².
• Acceleration due to gravity on Pluto is 9.8 m/s².
• The mass can be calculated using the formula: Mass = Pressure x Area / Gravity.

### Temperature of the Atmosphere at Altitude of 50 km

• Sea level pressure (Po) is 1.013 × 10^5 Pa.
• Pressure at 50 km altitude (P) is 100 Pa.
• Molar mass of the atmosphere (M) is 28.4 amu (atomic mass unit).
• Gravitational acceleration (g) is 9.8 m/s².
• Ideal gas constant (R) is 8.314 J K⁻¹ mol⁻¹.
• Use the barometric formula to find temperature (T) at 50 km.

### Wavelength of Photon to Dissociate O2

• Energy required to dissociate O2 is 495 kJ/mol.
• The relationship between energy (E) and wavelength (λ) is given by E = (hc)/λ where h is Planck's constant and c is the speed of light.
• Calculate wavelength (λ) using the dissociation energy of O2.

### Production of Free Radicals in the Atmosphere

• Free radicals are produced through two main processes:
• Chemical reactions: Reactions between existing chemicals can generate free radicals as intermediates.

### Concentration of Free Radicals in the Atmosphere

• Concentration of radicals varies depending on environmental conditions and presence of precursor species.
• Specific concentrations are not stated, but depend on altitude, solar radiation levels, and chemical compositions in the atmosphere.

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## Description

Test your knowledge of environmental chemistry and atmospheric layers with this quiz. Explore Pluto's atmosphere, atmospheric mass, pressure calculation, and the chemistry of air pollution.

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