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Nilai energi ikatan rata-rata untuk beberapa ikatan diberikan pada tabel berikut.

Nilai entalpi reaksi berikut adalah....

C H subscript 3 C l left parenthesis g right parenthesis plus C l subscript 2 left parenthesis g right parenthesis rightwards arrow C H subscript 2 C l subscript 2 left parenthesis g right parenthesis plus H C l left parenthesis g right parenthesis

  1. negative 109 space k J space m o l to the power of negative 1 end exponent

  2. plus 109 space k J space m o l to the power of negative 1 end exponent

  3. negative 218 space k J space m o l to the power of negative 1 end exponent

  4. plus 218 space k J space m o l to the power of negative 1 end exponent

  5. negative 323 space k J space m o l to the power of negative 1 end exponent

S. Lubis

Master Teacher

Mahasiswa/Alumni Universitas Sumatera Utara

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Pembahasan

P e r s a m a a n space r e a k s i space colon space space C H subscript 3 C l subscript left parenthesis g right parenthesis end subscript space plus space C l subscript 2 left parenthesis g right parenthesis end subscript space rightwards arrow space C H subscript 2 C l subscript 2 left parenthesis g right parenthesis end subscript space plus space H C l subscript left parenthesis g right parenthesis end subscript

K a r e n a space m e n g g u n a k a n space d a t a space e n e r g i space i k a tan space r a t a space – space r a t a comma space m a k a  increment H equals sum increment H subscript r e a k tan end subscript – sum increment H subscript p r o d u k end subscript  equals space left parenthesis left parenthesis 3 left parenthesis C space – space H right parenthesis space plus space left parenthesis C space – space C l right parenthesis space plus left parenthesis C l space – space C l right parenthesis space right parenthesis space – space left parenthesis left parenthesis 2 space left parenthesis C space – space H right parenthesis space plus space left parenthesis left parenthesis 2 space left parenthesis C space – space C l right parenthesis right parenthesis space plus space left parenthesis H space – space C l right parenthesis right parenthesis  equals space left parenthesis C space – space H right parenthesis space plus space left parenthesis C l space – space C l right parenthesis space – space left parenthesis C space – space C l right parenthesis space – space space left parenthesis H space – space C l right parenthesis  equals 410 space plus space 243 space – space 330 space – space 432 space  equals negative 109 k J divided by m o l

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Data nilai energi ikatan rata-rata diketahui sebagai berikut. CH3​Br(g)+Br2​(g)→CH2​Br2​(g)+HBr(g) Nilai entalpi reaksi di atas adalah......

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