Quantum mechanical tunnelling enables chemical reactions to proceed that would beenergetically impossible in classical mechanics. Assume that hydrogen (H) and tritium(T) atoms, each with a kinetic energy of 0.9 eV, encounter a potential barrier that is 1.0eV high and 100 pm broad. Calculate the ratio of probabilities for transmission of the Hand T atoms through the barrier.Note: the masses of H and T atoms are 1.674 x 10-27 kg and 5.008 x 10-27 kg, respectively,and 1 eV=1.602x10-19 J.

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