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20 October, 10:46

Given the balanced equation representing a phase change:

C6H4Cl2 (s) + energy==>C6H4Cl2 (g)

Which statement describes this change?

(1) It is endothermic, and entropy decreases.

(2) It is endothermic, and entropy increases.

(3) It is exothermic, and entropy decreases.

(4) It is exothermic, and entropy increases.

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Answers (1)
  1. 20 October, 11:12
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    The answer is (2). The energy is at left of the equation, so it absorbs energy. It is called endothermic. And the entropy is a measure of disorder. The disorder degree of gas is more than solid. So the entropy increases.
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