1. Intro to chemistry Therm o formation one elements
A. The standard enthalpy (heat) of ___________, ΔH°f, is defined as the change in enthalpy that accompanies the formation of ____ mole of the compound in its standard state from its ___________ in their standard states (at 1 atm and 298K).
formation
one
elements

2. Intro to chemistry
Therm o
one

3. Intro to chemistry Therm o fractional one elements ZERO
1. For comparison purposes, note that you will see ___________ coefficients to ensure only ______ mole of compound is formed.
2. The ΔH°f for ___________ (in their standard state) is always _______ kJ as they are used as the reference for the ΔH°f of compounds.
fractional
one
elements
ZERO

4. Intro to chemistry
Therm o

5. Intro to chemistry
Therm o
one

6. Intro to chemistry Therm o enthalpy
B. The ________ change for a chemical reaction, or amount of heat released or absorbed, can be determined by the following formula:
enthalpy

7. Intro to chemistry Therm o subscripts specific o
A. Be aware that you will encounter a variety of __________ following the ΔH, however, they are simply indicating a ________ type of reaction or change of state.
2. The naught, ___ , simply indicates standard conditions (1 atm and 0°C).
subscripts
specific o

8. Intro to chemistry Therm o profiles
A. Energy ________ (or diagrams) are theoretical representations of the energy pathway as the reactants are turned into products.
profiles

9. Intro to chemistry Therm o Activation enthalpy
1. The ________ change can be determined by comparing the energy of the products to reactants.
2. __________energy is the minimum amount of energy the reactants must possess for the reaction to proceed.
enthalpy
Activation

10. Intro to chemistry
Therm o