activation energy and rate of reaction
The activation energy of a certain reaction is 76.7 kj/mol. How many times faster will the reactionj occur at 62 degrees C than at 5 degrees C?
By the electrolysis of water, 11.2L of oxygen at STP was prepared. a) what charge was required? b) If a current of 0.5A was used, how long would it take?
Chemists commonly use a rule of thumb that an increase of 10 K in temperature doubles the rate of a reaction. What must the activation energy be for this statement to be true for a temperature increase from 49 to 59°C?
Only for above OTAs. Galvanic cell: What possible metals and solutions can be a part of each half of the galvanic cell - cathode and anode-and why?
2nd General Chemistry College Course Pactice Exam
SHOW ALL WORK Useful numbers: R = 0.08206 L atm/mol K = 8.314 J/mol K 1 atm = 760 torr = 760 mm Hg Multiple choice (2 points each) 1. I dissolved some NaCl in pure water, the boiling point was ________? a) same as pure water b) higher than pure water c) lower than pure water d) none of the above ...continues
The "role" of chemical equilibrium in electrochemical cells.
I do not understand why a reaction (oxidation and reduction) can continue producing electricity if equilibrium (at a given temperature) has already been reached. For example, the conversion of Fe2+(aq) ion to Fe3+(aq) ion is necessary for the anode half reaction to continue producing electrons while the continued conversion of ...continues
What is total charge of the neptunium nucleus? (93 electrons MW=237.0482
The "role" of enthalpy in electrochemical cells.
Let's say that a battery (or electrochemical cell) has a total delta G value of -100 KJ and a total delta H value of -100 KJ. Does this mean that the battery will actually produce 100 KJ of heat AND 100 KJ of electricity when discharged (hypothetically)? If so, why don't batteries feel hot to the touch when in operation? As ...continues
#1 ONLY - Ellingham Diagram - Iron and Copper Oxides Reducing
ONLY #1 from the sheet attached. These questions are like chemistry. I need help with these problems involving material engineering and chemistry to see how metals are reduced from oxides. I've done this on a quiz, but left something out and got zero credit. So could you please help me by showing your work for the solution ...continues
Ellingham diagrams for chemical rxns - ONLY #5
ONLY #5 from the sheet attached. These questions are like chemistry. I need help with these problems involving material engineering and chemistry to see how metals are reduced from oxides. I've done this on a quiz, but left something out and got zero credit. So could you please help me by showing your work for the solution ...continues
