Important Thermochemistry Concepts

How do you find the change in enthalpy of the reverse reaction?

• change the sign of the Delta H of the forward reaction

• take the inverse (1/x) of the forward reaction's Delta H

• Nothing- they are the same

What is an example of a state function?

• Enthalpy

• Temperature

• Work

The change in enthalpy can be calculated by:

• The sum of enthalpies of the reactants - the sum of enthalpies of the products

• The sum of enthalpies of the products - the sum of enthalpies of the reactants

When finding the final temperature after placing metal into water (calorimetry problem), you start by using the expression:

• q (metal) = -q (water)

• q (metal) = q (water)

When adding sub-reactions up to achieve the overall (desired) reaction, you must ___ the enthalpies of the sub-reactions to find the total enthalpy of the overall reaction

• add

• subtract

• divide

• multiply