which type of reaction occurs without being started by some outside force?\n○ spontaneous reaction\n○…

which type of reaction occurs without being started by some outside force?\n○ spontaneous reaction\n○ activation energy reaction\n○ physical reaction\n○ combustion reaction

which type of reaction occurs without being started by some outside force?\n○ spontaneous reaction\n○ activation energy reaction\n○ physical reaction\n○ combustion reaction

Answer

Brief Explanations:

A spontaneous reaction occurs naturally without the need for an outside - force to initiate it. Activation energy reactions require energy input to start. Physical reactions involve changes in physical state rather than chemical composition. Combustion reactions need an ignition source (an outside force).

Answer:

spontaneous reaction