[en] Using an existing computer code, a study is made of the sensitivity of gasdynamic laser calculations to uncertainties in the vibrational energy exchange rates associated with CO2-N2-H2O gas mixtures. The results show that calculations of gasdynamic laser gain and maximum available energy in the laser cavity can be subject to noticeable inaccuracy due to rate data uncertainties. Moreover, those rates to which the calculations are most sensitive are clearly delineated. (U.S.)