2013-3-6 Evaluating U,H,and S for Ideal Gas Mixtures For an ideal gas mixture,the values of U,H, and S are evaluated by adding the contribution of each component at the condition at which the component exists in the mixture. Evaluation of the specific interal energy or specific enthalpy of a mixture component i requires only a single intensive property:the mixture temperature,T. Evaluation of the specificentropy of a mixture component i requires two intensive properties. We will use the mixture temperature,T,and the partial pressure,p Evaluating U,H,and S for Ideal Gas Mixtures (Molar Basis) Accordingly,when working on a molar basis expressions for U,H,and S of a mixture consisting of several components are: U-4+a,++用属-之a(n 州=h+nA++nA-之nAn 2.6 62013-3-6 6 Evaluating U, H, and S for Ideal Gas Mixtures ►For an ideal gas mixture, the values of U, H, and S are evaluated by adding the contribution of each component at the condition at which the component exists in the mixture. ►Evaluation of the specific internal energy or specific enthalpy of a mixture component i requires only a single intensive property: the mixture temperature, T. ►Evaluation of the specific entropy of a mixture component i requires two intensive properties. We will use the mixture temperature, T, and the partial pressure, pi . Evaluating U, H, and S for Ideal Gas Mixtures (Molar Basis) ►Accordingly, when working on a molar basis expressions for U, H, and S of a mixture consisting of several components are: