Thermochemical Equations

Front

ΔH means:

Back

enthalpy

Front

If ΔH is positive, heat would be shown on the _____ side of the thermochemical equation.

Back

Reactant

Front

How much heat is absorbed if 4.0 mole A reacts? A + 2B + 22.0 kJ → 3C

Back

+88.0 kJ

Front

ΔH is the same thing as:

Back

q

Front

Using the thermochemical eq. given, calculate the heat evolved when 266 g of white phosphorus burns in air.

Back

-6468 kJ

Front

What is a thermochemical equation?

Back

An equation that includes the enthalpy change (ΔH) of a reaction.

Front

What does a negative ΔH indicate?

Back

The reaction is exothermic, meaning it releases heat.

Front

What does a positive ΔH indicate?

Back

The reaction is endothermic, meaning it absorbs heat.

Front

In a thermochemical equation, where is the heat term placed for an exothermic reaction?

Back

On the product side.

Front

In a thermochemical equation, where is the heat term placed for an endothermic reaction?

Back

On the reactant side.