Using the data in this table of the thermodynamic quantities for selected substances and given the pressures listed, calculate ƒ¢G at 25�‹C for each of the following reactions
(a) N2(g) + 3 H2(g) �¨ 2 NH3(g)
PN2 = 2.0 atm, PH2 = 5.4 atm, PNH3 = 2.2 atm
how do i calculatethis ?