Question

The temperature in the stratosphere is −24°c. calculate the root-mean-square speeds of n2, o2, and o3 molecules in this region.

Answer 1

Use Root mean square speed formula: vrms = Sqrt (3RT/M) T - temperature in K = 273K - 21CÎż = 252K R- molar gas constant = 8.31J/Kmol M - molar mass of a molecule MN2 = 14x2 = 28 g/mol MO2 = 16 x 2 = 32 g/mol MO3 = 16 x 3 = 48 g/mol Having all info now, you can calculate root mean square speed,vrms , for every molecule by using the aboveequasion and only changing M value.