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1. Energy and Chemistry
General Chemistry CHM 107 Dr Erdal Onurhan Slide 1
T2 T1
Direction of Heat Flow
Heat Flow
T2>T1

2. Energy and Chemistry
General Chemistry CHM 107 Dr Erdal Onurhan Slide 2
System-Boundary-Surroundings

3. Energy and Chemistry
General Chemistry CHM 107 Dr Erdal Onurhan Slide 3
Bomb Calorimeter

4. Energy and Chemistry
General Chemistry CHM 107 Dr Erdal Onurhan Slide 4
𝑞 𝑉 = 𝛥𝐸 (system at constant volume, no work flow)
𝑞 𝑃 = 𝛥𝐻 (system at constant pressure, PV−work only)
Heat Flow at Constant Volume and at
Constant Pressure

5. Energy and Chemistry
General Chemistry CHM 107 Dr Erdal Onurhan Slide 5
Temperature-Phase Change Relationship

6. Energy and Chemistry
General Chemistry CHM 107 Dr Erdal Onurhan Slide 6
Stoichiometric Calculations using
Thermochemical Equations

7. Energy and Chemistry
General Chemistry CHM 107 Dr Erdal Onurhan Slide 7
Hess’s Law