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We are studying the impact of HII regions on star formation in theirassociated molecular clouds. In this paper we present JCMT RxA molecular lineobservations of S175 and environs. This is the first within a sample of ten HIIregions and their surrounding molecular clouds selected for our study. We firstmake 7'x 7' maps in $^{12}$CO(2-1), which are used to investigate the structureof the cloud and to identify individual clumps. Single point observations weremade in $^{13}$CO(2-1) and CS(5-4) at the peak of the $^{12}$CO(2-1) emissionwithin each clump in order to measure the physical properties of the gas.Densities, temperatures, clump masses, peak velocities, and line widths weremeasured and calculated using these observations. We have identified twocondensations (S175A and S175B) in the molecular cloud associated with this HIIregion. S175A is adjacent to the ionization front and is expected to beaffected by the HII region while S175B is too distant to be disturbed. Wecompare the structure and gas properties of these two regions to investigatehow the molecular gas has been affected by the HII region.  S175A has been heated by the HII region and partially compressed by theionized gas front, but contrary to our expectation it is a quiescent regionwhile S175B is very turbulent and dynamically active. Our investigation for thesource of turbulence in S175B resulted in the detection of an outflow withinthis region.

Studies of Molecular Clouds associated with H II Regions: S175