The Temperature of Low Pressure Hydrogen Is Reduced from 100 $\degree$

question 70

Multiple Choice

The temperature of low pressure hydrogen is reduced from 100 $\degree$ C to 20 $\degree$ C. The rms speed of its molecules decreases by approximately:

• A) 80%
• B) 89%
• C) 46%
• D) 21%
• E) 11%