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Diketahui: 2 H 2 ​ ( g ) + O 2 ​ ( g ) → 2 H 2 ​ O ( g ) △ H = − 480 kJ Energi ikatan: O = O : 500 kJ mol − 1 H − H : 430 kJ mol − 1 Besarnya energi ikatan O − H dalam air adalah ....

Diketahui:


 


Energi ikatan:

 

Besarnya energi ikatan  dalam air adalah ....

  1. begin mathsize 14px style 220 space kJ space mol to the power of negative sign 1 end exponent end style 

  2. begin mathsize 14px style 440 space kJ space mol to the power of negative sign 1 end exponent end style 

  3. begin mathsize 14px style 460 space kJ space mol to the power of negative sign 1 end exponent end style 

  4. begin mathsize 14px style 960 space kJ space mol to the power of negative sign 1 end exponent end style 

  5. begin mathsize 14px style 1.840 space kJ space mol to the power of negative sign 1 end exponent end style 

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Y. Rochmawatie

Master Teacher

Jawaban terverifikasi

Jawaban

jawaban yang benar adalah C

jawaban yang benar adalah C

Pembahasan

Pembahasan
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Keterangan : EI = energi ikatan Jadi, jawaban yang benar adalah C

begin mathsize 14px style 2 H subscript 2 space left parenthesis italic g right parenthesis plus O subscript 2 space left parenthesis italic g right parenthesis yields 2 H subscript 2 O space left parenthesis italic g right parenthesis end style

begin mathsize 14px style 2 middle dot H bond H and O double bond O yields 2 middle dot H bond O bond H end style

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell increment straight H end cell equals cell straight capital sigma space energi space pemutusan minus straight capital sigma space energi space pembentukan end cell row cell negative 480 space kJ end cell equals cell open curly brackets open parentheses 2 times EI space straight H minus straight H close parentheses plus EI space straight O equals straight O close curly brackets minus open curly brackets 4 times straight O minus straight H close curly brackets end cell row cell negative 480 space kJ end cell equals cell open curly brackets open parentheses 2 times 430 space kJ divided by mol close parentheses plus 500 space kJ divided by mol close curly brackets minus open curly brackets 4 times straight O minus straight H close curly brackets end cell row cell 4 times straight O minus straight H end cell equals cell 1360 space kJ divided by mol plus 480 space kJ end cell row cell 4 times straight O minus straight H end cell equals cell 1840 space kJ divided by mol end cell row cell straight O minus straight H end cell equals cell fraction numerator 1840 space kJ divided by mol over denominator 4 end fraction end cell row cell straight O minus straight H end cell equals cell 460 space kJ divided by mol end cell end table end style

Keterangan : EI = energi ikatan

 

Jadi, jawaban yang benar adalah C

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Diketahui: 2 HBr ( g ) → H 2 ​ ( g ) + Br 2 ​ ( g ) △ H = + 72 kJ H 2 ​ ( g ) → 2 H ( g ) △ H = + 434 kJ Br 2 ​ ( g ) → 2 Br ( g ) △ H = + 158 kJ Besarnya energi ikatan rata-rata H-Br yaitu ...

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