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Mohon dibantu yg nomor 8 yaa
Mohon dibantu yg nomor 8 yaa

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  • Mr C2H5OH= 2ArC+6ArH+ArO
    =2.12+6.1+16 = 46 g/mol
    nC2H5H = m/Mr =138 g/46g/mol =3 mol
    entalpi pembentukan = delta H/n
    = -278/3 = -92,7 Kj

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