Question

Question
1
Question
2
Question
3
A)
A researcher can determine that an exothermic reaction has occurred in a flask if
(1 point)
lots of particle movement is visible.
the flask feels cool.
the flask feels warm.
minimal particle movement is visible.
A)
In a certain reaction, molecules are moving faster and colliding more often as reactants turn intoproducts. Which action is happening?
(1 point)
Heat is being passed; the reaction is exothermic.
Heat is being absorbed; the reaction is endothermic.
Heat is being passed; the reaction is endothermic.
Heat is being absorbed; the reaction is exothermic.
A)
Which tool would a scientist use to measure reaction energy?
(1 point)
reaction vessel
calorimeter
vacuum flask
bond energy meter
Question
4
Question
5
A)
Which phrase describes
chemical potential energy
?
(1 point)
the amount of energy needed to break a bond
the amount of energy stored in bonds
the amount of energy absorbed by reactants
the amount of energy absorbed by products
A)
Into which type of reaction would a scientist have to infuse a lot of energy in order to cause thereaction to occur?
(1 point)
slightly exothermic
slightly endothermic
highly exothermic
highly endothermic

Answer 1

1) the flask feels warm.

2) Heat is being absorbed; the reaction is endothermic.

3) calorimeter.

4) the amount of energy stored in bonds.

5) highly endothermic.