12. Determine ΔS, ΔU, ΔH, ΔA, ΔG when mixing VA m3 of gas A and VB m3 of gas B; T=298 K. The initial gas pressure is 1.01*105 Pa. The final volume of the mixture VK = VA VB. Gases A and B and their volumes are given in the table on p. 95 (assume that these substances obey the laws of ideal gases).
N option Gas A VA*104, m3 TA,K Gas B VB*104, m3 TB,K P, Pa
12 С2H6 8 313 CH4 9 289 151987

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