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Chem 1020 Exam 1 (2).
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Chem 1020 Exam 1 (2).
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Chem 1020 Exam 1Is the change in enthalpy positive or negative when bonds are broken? - ANS-Positive
Is the change in entropy positive or negative when bonds are broken? - ANS-Positive
Is the change in Gibbs Free Energy positive or negative in a spontaneous reaction? -
ANS-Negative
When a solution has a negative change in enthalpy, which is larger: change in enthalpy
of solute-solute plus change in enthalpy of solvent-solvent -or- change in enthalpy of
solute-solvent? - ANS-Change in enthalpy of solute-solvent.
If an isotope is radioactive, what order is it? - ANS-First
What is the Gibbs Free Energy of formation for an element in its standard state? -
ANS-0
What is molality? - ANS-moles solute/kg solvent
If a reaction is spontaneous, will the change in Gibbs Free Energy be positive or
negative? - ANS-Negative.
What is the formula for change in enthalpy of the reaction? - ANS-Change in enthalpy of
the products - change in enthalpy of the reactants.
When the ^H and the T^S have opposite signs, the reaction is spontaneous at high or
low temps? (If ^ is a larger than ^H). - ANS-low
When heat is a product of a reaction, is the change in entropy of the surroundings
positive or negative? - ANS-Positive
A substance is made of all carbon-hydrogen bonds. Is it polar or nonpolar? -
ANS-Nonpolar
What is the first law of thermodynamics? - ANS-Energy cannot be created or destroyed.
What is the second law of thermodynamics? - ANS-The total entropy of the universe
increases in any spontaneous process.
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