Question

HELP ASAP!! DUE TOMORROW!! FAN & MEDAL!! PLEASE I DON'T UNDERSTAND THIS!! I CAN'T AFFORD TO GET AN F!! ANYTHING WOULD HELP ME PLEASE!! I HAVE AN F IN THIS CLASS ALREADY!!

2. Your teacher asks you to mix two compounds to find out if the reaction is endothermic or exothermic. What will you do to determine which type of reaction is occurring?

5. You are investigating the reaction rate of a chemical reaction. How might the required activation energy be affected if you add a catalyst to the reaction? If you add a inhibitor to the reaction?

Answer 1

2. Think about what endothermic and exothermic mean.
Endothermic = Consumes heat
Exothermic = Releases heat
So if you measure the temperature of the mixture (say, with a thermometer), and the you see that the temperature increased, does that mean that the reaction released or consumed heat? ... Well, if the chemicals released heat during their reaction, the thermometer would feel the heat that was released! If the chemicals consumed heat to do the reaction, then your thermometer would feel the loss of heat that went from the chemicals' surroundings to fuel the chemical reaction.

5. The activation energy of the reaction itself won't change when you add a catalyst or inhibitor. These simply provide different paths with different activation energies for the reaction to take place. A catalyst will provide a path that has a lower activation energy than the reaction itself. An inhibitor will provide a path with a higher activation energy than the reaction has.