3. 1 mol of the cis-isomer is in a 5-liter reactor at 4000C, where it is isomerized into the trans-isomer. The table shows data on the amounts of substances in the reaction system. Calculate the change in isobaric potential during the cis-trans transformation.
time Number of moles
cis isomer trans isomer
0 1.00 0
190 min 0.96 0.04
420 min 0.90 0.10
8 hours 0.85 0.14
week 0.50 0.50
month 0.50 0.50

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