January 2019 1 116 Report
Energi yang dilepas pada pembakaran etanol C2H5OH (Mr = 46) sebesar 618 kJ. Bila DELTA Hf C2H5OH(l) = -278 kJ/mol. Maka banyaknya etanol yang dibakar adalah....
A. 184,0 gr
B. 92,0 gr
C. 46,0 gr
D. 23,0 gr
E. 11,5 gr
(Dengan cara)
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