Molecular Speeds: an Ideal Gas Is Kept in a Rigid

question 115

Multiple Choice

Molecular speeds: An ideal gas is kept in a rigid container that expands negligibly when heated. The gas starts at a temperature of 20.0°C, and heat is added to increase its temperature. At what temperature will its root-mean-square speed (thermal speed) be double its value at 20.0°C?

• A) 40.0°C
• B) 141°C
• C) 313°C
• D) 400°C
• E) 899°C

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