Chem 152 Exam 1 Flashcards
Get yo shit right hoe
What is an increase in entropy?
Solid<Liquid<Gas
What signs of Delta H and Delta S make Delta G spontaneous at all temperatures?
Negative Delta H and Positive S
Formula for finding Temperature given Delta G,S,H
Delta G minus Delta H Divided Delta S
What is the equation looking for when asking to find the over all rate?
Rate=k[A][B] to their respectives powers
True or False: Heat is one way in which energy flows
True
True or False: Entopy has units of kJ/mol
True
True or False: a nonspontaneous process can occur if work is done on the system. When this happens, the 2nd law of thermodynamics is violated.
False
True or False: A negative sign for Delta S rxn indicates that the reaction will defintely be nonspontanous
False
True or False: A negative sign for Delta H indicated that the reaction is exothermic
True
True or False: The entropy change on melting is always negative
False
True or False: The rate of disappearance of a reactant is expressed with a negative number
True
True or False: the rate of a zero order is independent of the concentration of reactants.
True
What is ALWAYS true for a SPONTANEOUS reaction?
Delta S Universe is greater than 0 and Delta G system is less than 0
What conditions will cause a reaction that is nonspontaneous at room temperature to become spontaneous as the temperature decreases?
Negative Delta S and Delta H
How to find Delta Surroundings?
Minus Delta H of system divided by Temperature
How to find Delta S Universe?
Delta S Universe = Delta System + Delta Surroundings
What reactions are endothermic?
Up hill or noticing that the Temperature goes down
What reactions are exothermic?
Down hill or noticing that the Temperature goes up
What is exothermic?
The loss of temperature to the surroundings
What is endothermic?
The gaining of heat
Second Law of Thermodynamics is
The entropy of the Universe which means that it increases in a spontaneous process and remains unchanged at equilibrium.
Negative Delta H is?
exothermic
Positive Delta H is?
endothermic