What type of change occurs when water changes from a solid to a liquid? *

1 answer:

5 0

Melting

Melting is a change in property of matter from solid to liquid

Matter is anything that occupies space and has mass. Thus, there are fundamentally three types of matter which is solid liquid and gas. But why do gases and liquids diffuse and not solids? It is because of the molecular structure of these components of matter. If we examine the molecular structure of gas the molecules are highly scattered and liquid has also almost the same structure as mediocrely scattered that these particles can easily slip through other substances unlike solid which is entirely intact. <span> </span>

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An unknown compound melting at 131 - 133 C. It is thought to be one of the following compounds: trans-cinnamic acid (133-134); b

Vesnalui [34]

Answer:

benzamide

Explanation:

Compound melting Point ,ºC Melting Pont Mixture, ºC

X 131 - 133

trans-cinnamic 133 - 134 110 - 120

acid

benzamide 128 - 130 130-132

malic acid 131 -133 114 -124

Benzoin 135 - 137 108 - 116

The compound X is benzamide since the melting point range is the one closest to this compound ( 130-132 ºC)

The reason there is not an exact match is not due due to the presence of impurities. The presence of impurities always lower the melting point ( it is a coligative property such as the melting point depresion of salt and water )

The reason for the deviation must be be some other factors such as preparation of the sample in the capillary, errors in reading the thermometer, rate of heating, etc.

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