Topic 6: Part I Thermochemistry. Thermochemistry : The Study of heat change in chemical reactions. Energy – the capacity to do work or produce heat Types of Energy: Radiant – solar energy, comes from the sun Thermal – energy associated with the random motion of atoms and molecules
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Thermochemistry: The Study of heat change in chemical reactions
energy can be converted from one form to another, but not created or destroyed.
N2 + 2O2 → 2NO2∆H1 = 68kJ
Reaction steps added:
N2 + O2 → 2NO ∆H2 = 180kJ
2NO + O2 → 2NO2 ∆H3 = -112kJ
N2 + 2O2 → 2NO2∆H2 + ∆H3 = 68kJ