Physical change | Chemical change |
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There is always change in state. | There may be a change of state. |
The change of state may be accompanied by a change of color. | A chemical change may lead to change of color of a substance. |
No new chemical is formed. | New chemicals are formed. |
No new gases or water vapor is released from a substance undergoing a physical change. | When a substance is undergoing a chemical change, new gases or water vapor may be released from the chemical reaction. |
When a physical change occurs, inter molecular bonds are stretched or broken. | When a chemical change occurs, both inter and intra molecular bonds are first broken and then rearranged to form new bonds and new molecules. |
Energy is absorbed when states change from solid to liquid and liquid to gas. | Energy is absorbed in endothermic chemical reactions. |
Energy is released when states change from gas to liquid and liquid to solid. | Energy is released in exothermic chemical reactions. |