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Diketahui data energi ikatan sebagai berikut. C = O = 799 kJ mol − 1 C − O = 358 kJ mol − 1 C − C = 374 kJ mol − 1 C − H = 413 kJ mol − 1 H − O = 467 kJ mol − 1 O = O = 495 kJ mol − 1 Reaksi 2 CO 2 ​ ( g ) + 3 H 2 ​ O ( l ) → C 2 ​ H 5 ​ OH ( l ) + 3 O 2 ​ ( g ) memiliki perubahan entalpi sebesar ....

Diketahui data energi ikatan sebagai berikut.

 

 

 

 

 

 

Reaksi 

memiliki perubahan entalpi sebesar .... 

  1. begin mathsize 14px style plus space 1.508 space kJ space mol to the power of negative sign 1 end exponent end style 

  2. size 14px plus size 14px space size 14px 1 size 14px. size 14px 131 size 14px space size 14px kJ size 14px space size 14px mol to the power of size 14px minus sign size 14px 1 end exponent 

  3. size 14px plus size 14px space size 14px 754 size 14px space size 14px kJ size 14px space size 14px mol to the power of size 14px minus sign size 14px 1 end exponent 

  4. size 14px minus sign size 14px space size 14px 754 size 14px space size 14px kJ size 14px space size 14px mol to the power of size 14px minus sign size 14px 1 end exponent 

  5. size 14px minus sign size 14px space size 14px 1 size 14px. size 14px 508 size 14px space size 14px kJ size 14px space size 14px mol to the power of size 14px minus sign size 14px 1 end exponent 

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Reaksi pada soal dapat di gambar sebagai berikut: Data yang akan dicari tahu adalah nilai entalpi ( ). Persamaan yang digunakan Mencari total energi ikatan reaktan Mencari total energi ikatan produk Mencari nilai Dengan demikian, tidak ada jawaban yang tepat pada pilihan jawaban .

Reaksi pada soal dapat di gambar sebagai berikut:

 

Data yang akan dicari tahu adalah nilai entalpi (begin mathsize 14px style increment H end style).

  • Persamaan yang digunakan

begin mathsize 14px style increment H equals begin inline style sum with blank below end style E space ikatan space reaktan minus sign begin inline style sum with blank below end style begin inline style E end style begin inline style space end style begin inline style ikatan end style begin inline style space end style begin inline style produk end style end style 

  • Mencari total energi ikatan reaktan   

begin mathsize 14px style begin inline style sum with blank below E space ikatan space reaktan equals left parenthesis 2 cross times 2 cross times C double bond O right parenthesis plus left parenthesis 3 cross times 2 cross times H bond O right parenthesis sum with blank below E space ikatan space reaktan equals left parenthesis 2 cross times 2 cross times 799 right parenthesis plus left parenthesis 3 cross times 2 cross times 467 right parenthesis sum with blank below E space ikatan space reaktan equals left parenthesis 3196 right parenthesis plus left parenthesis 2802 right parenthesis space sum with blank below E space ikatan space reaktan equals 5998 space kJ space mol to the power of negative sign 1 end exponent space end style end style 

  • Mencari total energi ikatan produk 

 begin mathsize 14px style begin inline style sum with blank below end style E space ikatan space produk equals left parenthesis 5 cross times C bond H right parenthesis plus open parentheses O bond H close parentheses and open parentheses C bond C close parentheses and open parentheses C bond O close parentheses plus left parenthesis 3 cross times O double bond O right parenthesis begin inline style sum with blank below end style E space begin inline style ikatan end style begin inline style space end style begin inline style produk end style begin inline style equals end style begin inline style left parenthesis end style begin inline style 5 end style begin inline style cross times end style begin inline style 413 end style begin inline style right parenthesis end style begin inline style plus end style begin inline style left parenthesis end style begin inline style 467 end style begin inline style right parenthesis end style begin inline style plus end style begin inline style left parenthesis end style begin inline style 374 end style begin inline style right parenthesis end style begin inline style plus end style begin inline style left parenthesis end style begin inline style 358 end style begin inline style right parenthesis end style begin inline style plus end style begin inline style left parenthesis end style begin inline style 3 end style begin inline style cross times end style begin inline style 495 end style begin inline style right parenthesis end style begin inline style sum with blank below E end style begin inline style space end style begin inline style ikatan end style begin inline style space end style begin inline style produk end style begin inline style equals end style begin inline style left parenthesis end style begin inline style 2065 end style begin inline style right parenthesis end style begin inline style plus end style begin inline style left parenthesis end style begin inline style 467 end style begin inline style right parenthesis end style begin inline style plus end style begin inline style left parenthesis end style begin inline style 374 end style begin inline style right parenthesis end style begin inline style plus end style begin inline style left parenthesis end style begin inline style 358 end style begin inline style right parenthesis end style begin inline style plus end style begin inline style left parenthesis end style begin inline style 1485 end style begin inline style right parenthesis end style begin inline style sum with blank below end style begin inline style E end style begin inline style space end style begin inline style ikatan end style begin inline style space end style begin inline style produk end style begin inline style equals end style begin inline style 4749 end style begin inline style space end style begin inline style kJ end style begin inline style space end style begin inline style mol to the power of negative sign 1 end exponent end style begin inline style space end style begin inline style space end style begin inline style space end style end style  

  • Mencari nilai begin mathsize 14px style increment H end style

begin mathsize 14px style increment H equals begin inline style sum with blank below end style E space ikatan space reaktan minus sign begin inline style sum with blank below end style begin inline style E end style begin inline style space end style begin inline style ikatan end style begin inline style space end style begin inline style produk end style space increment H equals left parenthesis 5998 right parenthesis minus sign left parenthesis 4749 right parenthesis space kJ space mol to the power of negative sign 1 end exponent space increment H equals plus 1249 space kJ space mol to the power of negative sign 1 end exponent space end style  

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Apabila diketahui data energi ikatan rata-rata: C − H = 413 kJ mol − 1 Cl − Cl = 239 kJ mol − 1 C − Cl = 339 kJ mol − 1 H − Cl = 427 kJ mol − 1 perubahan entalpi reaksi: CH 4 ​ ( g ) + C...

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