exo&endothermic reaction

Energy must be ................ to break the bond.

• added

• released

Energy is ............ when bonds are formed.

• added

• released

Chemical energy is ............ in chemical reaction

• conserved

• destroyed

• published

 

An exothermic reaction releases heat to the surroundings; so   $\Delta$ H is

• negative 

• positive

• has no change

An endothermic reaction absorbs heat from the surroundings so, $\Delta H$  

•  is negative

• is positive

• has no change

The reverse of an exothermic reaction is …… ………….

The reverse of an endothermic reaction is ………………..

The left handed graph represents.........

• endothermic reaction

• exothermic reaction

The right handed graph represents...............

• endothermic reaction

• exothermic reaction