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A gas is at 27 °C. To what temperature must it be heated to double its rms speed?
A927 °C
B54 °C
C327 °C
D1200 °C
Answer & Solution
Correct answer: A. 927 °C
Doubling vrms needs four times the absolute temperature, 4 × 300 K = 1200 K, which is 927 °C.
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