Concerns over the harmful effects of chlorofluorocarbon on stratospheric ozone motivated a search for new refrigerants. One alternative was 2,2-dichloro-1,1-trifluoroethane (''refrigerant 123'').
a) Compute µJT( joule Thomson coefficient) at 1.00bar and 30.0 degrees, given that( dH/dP)subscript T = -3.29*10^3 jmol^-1 MPa^-1 and Cp= 110.0j K^-1
b) Estimate the temperature change that would accompany adiabatic expansion of 5.00 mol of this refrigerant from 5.00 bar at 30.0 degrees.