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### 16 Cards in this Set

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 what is the first law of thermodynamics: energy can neither be created or destroyed an endergonic reaction ... nonspontaneous reaction and absorbs energy from bonds, do not occur spontaneously enthalpy the internal energy or chemical bond energy in the form of heat ΔH ~ ΔE what is the second law of thermodynamics: all systems tend toward equilibrium - the lowest energy the greater the disorder or randomness in a system, the larger the ... entropy the third law of thermodynamics states that: the entropy content of a system can only be zero at 0 degrees Kelvin in this equation below: ΔH - TΔS = 0 the 0 represents what? free energy ΔH represents change in enthalpy TΔS represents change in entropy at equilibrium what is going on in terms of energy? there is energy in the system, but none to do work a spontaneous reaction is said to be ... exergonic an enthalpically favored reaction is said to be ... exothermic fill in the boxes with either a plus or minus sign: (see figure) what does this equation represent: ΔG˚' = ΔH˚' - TΔS˚' the standard state the standard state is defined to be: 1 atm 25˚C Keq is the equilibrium constant and is defined as: ratio of [B]/[A] where B is the product and A is the substrate