The molecule ClO is believed to participate in the seasonal depletion of ozone over Antarctica, so it has been extensively studied. The rotational constants are reported to be 13109.4, 2409.8, and 2139.7 MHz with a symmetry number of 2. The vibrational wavenumbers are 753, 542, 310, 127, 646, and 419 cm . (all non-degenerate). Calculate the value of G (200 K) - G (0).