Energy
units
Is it spontaneous? (Apply DG =DH-TDS) DG =DH-TDS • =145,000 – 382(322) • = 22,000 • Positive: nonspontaneous. Energy: What Changes Should We Make?
types
diets
Specific heat
enthalpy
5. Hess’s Law (L1 only) a powerful tool
Hess’s Law
Slide 17: Hess’s Law 1
Free energy
• Enthalpies of reaction may be • Combined • Reversed • Multiplied DHrxn can be found without performing the reaction
Water, ice, and steam
issues
units
Hess’s Law
Energy
Eco-cars
enthalpy
Free energy
Eco-cars
issues
types
For a reaction: DH=145,000 J DS = 322 j/K T= 382K
Slide 15: Free Energy Calculations
sources
Specific heat
Water, ice, and steam
sources
diets
Energy: What Changes Should We Make?
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