Thermochemistry

Front

In an exothermic process the surrounding loses heat.

Back

False

Front

In an endothermic reaction, is the system releasing energy?

Back

False

Front

Is the combustion of gasoline endothermic or exothermic?

Back

Exothermic

Front

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

Back

Exothermic process

Front

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?

Back

Endothermic

Front

How much energy would be produced if only 1 mol of nitrogen was reacted in the reaction: 2N₂ + 3H₂ --> 2NH₃ + 46 kJ?

Back

23 kJ

Front

How much energy must be used to produce 4.75 mol of gaseous water?
H₂O (l) +  44.0 kJ --> H₂O (g)

Back

207 kJ

Front

What mass of P₄ must be reacted to produce 5905 kJ of energy?
P₄ + 6Cl₂ --> 4PCl₃ + 2439 kJ

Back

300.0 g

Front

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

Back

Lower

Front

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

Back

Higher