RoseMarie Gallagher and Paul Ingram Solutions for Chapter: Energy Changes, and Reversible Reactions, Exercise 1: Q

Is it an exothermic or endothermic reaction?

The burning of a candle.

Is it exothermic or endothermic reaction?

The reaction between sodium and water.

Is it an exothermic or endothermic reaction?

The change from raw egg to a fried egg.

What unit is measured to measure energy changes?

$2\mathrm{Na} \left(\mathrm{s}\right) + {\mathrm{Cl}}_2 \left(\mathrm{g}\right) \stackrel{}{\to } 2\mathrm{NaCl} \left(\mathrm{s}\right)$

The energy change for this reaction is $-822 .4 \mathrm{kJ}$.

What can you conclude about it? 

Draw an energy level diagram for: an endothermic reaction.

Draw an energy level diagram for: an exothermic reaction.