Question

A researcher can determine that an exothermic reaction has occurred in a flask if(1 point)
Responses

the flask feels cool.
the flask feels cool.

minimal particle movement is visible.
minimal particle movement is visible.

the flask feels warm.
the flask feels warm.

lots of particle movement is visible.

Answer 1

A researcher can determine that an exothermic reaction has occurred in a flask if **the flask feels warm**.

This is because exothermic reactions release heat, causing the temperature of the surroundings (in this case, the flask) to increase.