Thermochem #2

Is a reaction endothermic or exothermic if the reaction container feels warm?

• endothermic
• exothermic

Is a reaction endothermic or exothermic if the products contain more energy than the reactants?

• endothermic
• exothermic

Is a reaction endothermic or exothermic if the ΔH is positive?

• endothermic
• exothermic

Is a reaction endothermic or exothermic if energy is absorbed by the system?

• endothermic
• exothermic

Exothermic reactions are reactions that

• release heat
• do not involve heat
• absorb heat
• take place instantaneously

Which of the following reactions would be considered enothermic?

• condensation
• H₂O (L) --> H₂O (s)
• H₂O (L) --> H₂O (g)
• H₂O (g) --> H₂O (L)

Which of the following would NOT speed up a reaction?

• decreasing the temperature
• increasing the temperature
• lowering the activation energy
• stirring

A process that absorbs heat is a(n) _________ process.

• endothermic
• polythermic
• ergothermic
• exothermic

The rate of reaction (ΔH_r) depends on ________.

• concentration of reactants
• temperature of reaction
• whether or not a catalyst is used
• all of the above

Consider the reaction: 2 H₂O + energy --> 2 H₂ + O₂

• exothermic, releasing energy
• exothermic, absorbing energy
• endothermic, absorbing energy
• endothermic, releasing energy