Question
Wed July 25, 2012 By:
 

how does mass of a substance alter in a physical change ?

Expert Reply
Thu July 26, 2012

A physical change can affect the size, shape or color of a substance but does not affect its composition or mass. The substances may be changed to another phase (i.e. gas, liquid, solid) or separated or combined.

Examples:

when ice melts
when sulfur is mixed with iron filings. 
breaking a glass 
dissolving sugar in water

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