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How does a phase change from solid to liquid occur in a substance?(1 point)

A. Heat energy is released from the substance, weakening the electrical attraction between molecules.

B. Heat energy is added to the substance, weakening the electrical attraction between molecules.***

C. Heat energy is added to the substance, strengthening the electrical attraction between molecules.

D. Heat energy is released from the substance, strengthening the electrical attraction between molecules.

( I chose B am I right?)

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3 answers

  1. 1. Heat energy is added to the substance, weakening the electrical attraction between molecules.

    2. Both the melting point and boiling point are lower.

    3. dipole

    4. Water and ethanol have different molecular structures.

    5. The lone pairs of electrons in the oxygen atom causes the molecule to be bent; the oxygen atom has a partial negative charge, while the hydrogen atoms have partial positive charges.

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  2. 100% Correct

    1.Heat energy is added to the substance, weakening the electrical attraction between molecules.
    2.Both the melting point and boiling point are lower.
    3.The electropositive hydrogen atom in one molecule and an electronegative atom in another molecule experience attraction.
    4. dipole
    5.Water and ethanol have different molecular structures.

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  3. yes

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