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30 đề thi học sinh giỏi môn hóa học lớp 10 & 11 của các trường chuyên khu vực duyên hải đồng bằng bắc bộ có đáp án

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monobrom duy nhất G phân tử <strong>có</strong> tính đối xứng cao CTCT<br />

(B)<br />

CH 3<br />

0,75<br />

H 3 C<br />

H 3 C<br />

CH 3<br />

CH 3<br />

CH 3<br />

(C)<br />

CH 2 -C(CH 3 ) 3<br />

C CAg<br />

(D)<br />

CH 2 -C(CH 3 ) 3<br />

CO-CH 3<br />

(X)<br />

COOH<br />

2<br />

HOOC<br />

HOOC<br />

COOH<br />

COOH<br />

(Y)<br />

COOH<br />

0,5<br />

9<br />

1<br />

(1) Ta <strong>có</strong> : H 0 pư = (2.0 + 2 (-241,83)) - 4 (-92,31) - 1.0<br />

= - <strong>11</strong>4,42 (kJ)<br />

S 0 pư = (2 . 188,7) + 2,222,9 - 205,03 - 4.186,7<br />

= - 128,63 (J/K)<br />

G 0 pư = H 0 pư - 298 S 0 pư<br />

13

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