AOL Review Endo/Exothermic Reactions and Heating Curves

Front

What is the melting point of NaCl?

Back

801°C

Front

Is the reaction of NaCl heating endothermic or exothermic?

Back

Endothermic

Front

What does ΔH represent in thermodynamics?

Back

The change in heat of the reaction, also known as q.

Front

What is the change of heat of the reaction (ΔH) for a reaction that releases -20 kJ?

Back

-20 kJ

Front

If ΔT is positive, what does it indicate about heat?

Back

Heat is being released by the reaction.

Front

If ΔT is negative, what does it indicate about heat?

Back

Heat is being absorbed by the reaction.

Front

Define endothermic reaction.

Back

A reaction that absorbs heat from its surroundings.

Front

Define exothermic reaction.

Back

A reaction that releases heat to its surroundings.

Front

What is the significance of the heating curve in thermodynamics?

Back

It shows the phase changes and temperature changes of a substance as heat is added.

Front

What happens to the temperature of a substance during a phase change?

Back

The temperature remains constant while the substance changes phase.