760 torr - College Board

C2H5OH(g) ?c?ata? lyst?? C2H4(g) + H2O(g) DH298 = 45.5 kJ/molrxn; DS298 = 126 J/(K molrxn)

ethanol

ethene water

1 atm 760 torr

PV

(0.775 atm)(0.0854 L)

n = RT = (0.08206 L atm mol-1 K-1)(305 K) = 0.00264 mol

% yield

=

actual yield maximum possible yield

? 100

=

0.00264 mol 0.00434 mol

DG298

(

e

-DG? RT

)

?2015 The College Board. Visit the College Board on the Web: .

?2015 The College Board. Visit the College Board on the Web: .

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