To change the sign of ∆G of a reaction you can change the temperature change the enthalpy change the entropy add a catalyst Calculate ∆Gº for the reaction, NO2(g)+N2O(g)→3NO(g), where ∆Gfº=51.8 kJ/mol for NO2(g), 104 kJ/mol for N2O(g), and 86.7 for NO(g): 69.1 kJ 104 kJ -69.1 kJ -104 kJ When is a reaction never spontaneous? ∆H>0, ∆S>0 ∆H 0 Keq=Q Keq<1

Match the vocabulary terms to their definitions. 1 . a long, chain-like set of molecules made up of repeating units joined end to end polymer 2 . a hard, brittle, heat- and corrosion-resistant material made by subjecting a nonmetallic mineral mixture to intense heat ceramic 3 . a plastic with low elongations that cannot be recycled thermoset 4 . a carbon fiber embedded in a polymer resin matrix thermoplastic 5 . a plastic with high elongations that can be recycled crystal 6 . a solid form resulting from the arrangement of atoms, ions, or molecules in definite geometric patterns composite