Question
Asked Dec 3, 2019
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Two vessels are labeled A and B. Vessel A contains NH3 gas at 74°C, and vessel B contains Ne gas at the same temperature. If the average kinetic energy of NH3 is 7.1 ×10−21 J/molecule at 70°C, calculate the root-mean-square speed of Ne atoms in m/s.

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Expert Answer

Step 1

The root mean square speed can be calculated as,

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3RT ms Where R is the universal gas constant, T is the temperature and M is the molar mass

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Step 2

The temperature is given as 74 oC, converting it in Kelvin,

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T 273 74 T 347 K R 8.314 kg m2 s-2/mol-1 K-1 M 20 g 20 x 10-3 kg

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Step 3

Substituting the...

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3RT ms м 3 x 8.314 x 347 Vms2 20 x 10-3 ms = 657.83 m/s

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