ch20-p049 - 49. Using Eq. 19-34 and Eq. 19-35, we arrive at...

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49. Using Eq. 19-34 and Eq. 19-35, we arrive at Δ v = ( 3 2 ) RT/M (a) We find, with M = 28 g/mol = 0.028 kg/mol (see Table 19-1), Δ v i =87 m/s at 250 K, (b) and Δ v f =122 1.2 ¡ 10 2 m/s at 500 K. (c) The expression above for Δ v implies T = M R ( 3 2 ) 2 ( Δ v ) 2 which we can plug into Eq. 20-4 to yield
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