Thermochemistry Pre/Post Test

If two objects have different temperatures, heat will flow from the warmer object to the cooler one UNTIL ____________

• one reaches a temperature of zero
• they both have an equal temperature
• one runs out of energy

In an exothermic process, the surroundings are are gaining energy.

• True
• False

For an exothermic reaction, the heat is on the ____ side

• reactant
• product
• either side

In an endothermic reaction the system is releasing energy.

• True
• False

Is the combustion of gasoline endothermic or exothermic?

• Endothermic
• Exothermic

As someone is running on the track they begin to perspire.  If the runner is our system, are they endothermic or exothermic?

• Endothermic process
• Exothermic process

A reaction is performed in a beaker with a temperature probe recording the temperature changes of the reaction.  If the temperature began at 15.0 degrees Celsius and ended at 27.5 degrees Celsius.  If the reaction is our system, is the system endothermic or exothermic?

• Exothermic
• Endothermic

Do reactants in an endothermic reaction have a higher or lower energy than the products? 

• Higher
• Lower

Do the reactants in an exothermic reaction have a higher or lower energy than the products?

• Higher
• Lower

During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______.

• Warm

• Cold

• Bubbly

• Damp