def VapEtlp_pP(P,T,x_N2):
	x = (P-5.58238537e+02)/3.71707300e-01
	y = (T--1.76514223e+02)/8.64501333e-02
	z = (x_N2-8.61685517e-01)/1.23828182e-02
	output = \
	    1*9.69496508e+00
	vap_etlp = output*1.00000000e+00+0.00000000e+00
	return vap_etlp