Calculate the free-energy change of the following reaction at 502 C and standard pressure. Values in the table are at standard pressure and 25°C. 1st attempt i See Periodic Table O See Hint C,H,(g) +30,(g) – 2C0,(g)+ 2H,0(g) AH ,(kJ/mol) St, J/mol•K AGf, kJ/mol C2H4(8) 52.3 219.5 68.1 205.0 CO2lg) -393.5 213.6 -394.4 H20(g) -241.8 188.7 -228.6

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