Instructions: select the correct answer. generators need a source of energy to produce electricity. which form of energy is a nonrenewable source of energy? a. hydro (water) energy b. geothermal energy c. fossil fuel d. wind energy

The answer is going to be C. Although producing at a fast rate, fossil fuel cannot be re-used or recycled. Wind can be re-used, geothermal energy can be re-used, and hydro energy can be re-used.

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Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.