Question

Based on the molecular diagrams, classify each change as a physical or chemical change. Physical change Chemical change 6 7 8 9 O backspace YIUTOP GIHIJIK L Answer Bank contact us help about u io t SC 7 6 8 9

Answer 1

If two molecules are react to form a new molecules then it is a chemical change

In the pictures top two are examples of chemical change. In each picture two different molecules are combine to form a new molecules.

If molecular structure remains same and interaction between molecules is different then it is a physical change.

The bottom two pictures are examples of physical change.

You can see in each case molecular structure remains same, the only change was molecules separated by some distance means interaction between molecules decreased. So both bottom pictures are representing physical change.