(a) HCl is formed from the elements according to: 1/2H2(g)+1/2Cl2(g)HCl(g) Calculate the enthalpy of formation of HCl(g) at 1000K and 1 bar pressure, given that the standard enthalpy of formatic 3,Hf(HCl,g), of gaseous HCl is 92.3kJmol1 at 298K Cpm(H2,g)=(29.0640.8363103KT+20.111107K2T2)Jmol1K1Cp,m0(Cl2,g)=(31.695+10.143103KT40.373107K2T2)Jmol1K1Cp,m(HCl,g)=(28.165+1.809103KT+15.464107K2T2)Jmol1K1 [6 marks]