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19 September, 15:48

When heat energy is added two changes are observed: Change A: solid changes phases to a liquid Change B: liquid changes phases to a gas What are the names or phase changes in A and B

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  1. 19 September, 16:05
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    A is melting. Melting occurs when the molecules of a solid speed up enough that the motion overcomes the attractions so that the molecules can move past each other as a liquid.

    b is evaporation The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor
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