1. At what temperature the mean speed of the molecules of hydrogen gas equals the escape speed from the earth
2. Estimate the number of collisions per second suffered by a molecule in a sample of hydrogen gas at STP. The mean free path (average distance covered by a molecule between two successive collisions )=1.38×10-5.
1. At what temperature the mean speed of the molecules of hydrogen gas equals the escape speed from the earth
2. Estimate the number of collisions per second suffered by a molecule in a sample of hydrogen gas at STP. The mean free path (average distance covered by a molecule between two successive collisions )=1.38×10-5.